{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:JL6Q7LK6FJFZCNTEX5FXAHJDDI","short_pith_number":"pith:JL6Q7LK6","canonical_record":{"source":{"id":"2106.14885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-06-28T10:03:11Z","cross_cats_sorted":["cs.AI","cs.IR"],"title_canon_sha256":"311d81cbf5ea90a69042573bc159c36ff2e33ad931f3ea5b4283d52f887da983","abstract_canon_sha256":"2350bf49b4c4106593fe83b49ea631071244a8c6f969c341a3b114116b9baaf8"},"schema_version":"1.0"},"canonical_sha256":"4afd0fad5e2a4b913664bf4b701d231a3d8b7a8aebdac3daa61fa15e681af82a","source":{"kind":"arxiv","id":"2106.14885","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.14885","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"arxiv_version","alias_value":"2106.14885v1","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.14885","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"pith_short_12","alias_value":"JL6Q7LK6FJFZ","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"pith_short_16","alias_value":"JL6Q7LK6FJFZCNTE","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"pith_short_8","alias_value":"JL6Q7LK6","created_at":"2026-07-05T03:14:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:JL6Q7LK6FJFZCNTEX5FXAHJDDI","target":"record","payload":{"canonical_record":{"source":{"id":"2106.14885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-06-28T10:03:11Z","cross_cats_sorted":["cs.AI","cs.IR"],"title_canon_sha256":"311d81cbf5ea90a69042573bc159c36ff2e33ad931f3ea5b4283d52f887da983","abstract_canon_sha256":"2350bf49b4c4106593fe83b49ea631071244a8c6f969c341a3b114116b9baaf8"},"schema_version":"1.0"},"canonical_sha256":"4afd0fad5e2a4b913664bf4b701d231a3d8b7a8aebdac3daa61fa15e681af82a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:14:35.509097Z","signature_b64":"oJoh4DwUcHbZ4R7jYXAitAAcOdLxVMXEig+84jk+wXxy64fHTTGWQrVCLB2J05rfUE8m8GLQCLbjMNd5enrIBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4afd0fad5e2a4b913664bf4b701d231a3d8b7a8aebdac3daa61fa15e681af82a","last_reissued_at":"2026-07-05T03:14:35.508641Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:14:35.508641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2106.14885","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:14:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gqDrCAgJwMBuN3QB9YDBT7dex6pk2Fm9WFj97qIo9eGgP1za6qsF2ca5hlngnI0KRk/JI/RKpmP5b4m4tnYIAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:07:28.444564Z"},"content_sha256":"861a05e887b948ca068b475a61798e84e919781b8d0443f255cb3955e0e58d03","schema_version":"1.0","event_id":"sha256:861a05e887b948ca068b475a61798e84e919781b8d0443f255cb3955e0e58d03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:JL6Q7LK6FJFZCNTEX5FXAHJDDI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Overview of BioASQ 2021: The ninth BioASQ challenge on Large-Scale Biomedical Semantic Indexing and Question Answering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","cs.IR"],"primary_cat":"cs.CL","authors_text":"Anastasia Krithara, Anastasios Nentidis, Eirini Vandorou, Georgios Katsimpras, Georgios Paliouras, Luis Gasco, Martin Krallinger","submitted_at":"2021-06-28T10:03:11Z","abstract_excerpt":"Advancing the state-of-the-art in large-scale biomedical semantic indexing and question answering is the main focus of the BioASQ challenge. BioASQ organizes respective tasks where different teams develop systems that are evaluated on the same benchmark datasets that represent the real information needs of experts in the biomedical domain. This paper presents an overview of the ninth edition of the BioASQ challenge in the context of the Conference and Labs of the Evaluation Forum (CLEF) 2021. In this year, a new question answering task, named Synergy, is introduced to support researchers study"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.14885","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2106.14885/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:14:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zX8jkhLnYAG0I/iir8sxr/yOqvduEGWuwqRvB9AENXWtbeBdhYDd8Y7R8ycS0Q7I0IZ+vxM7UeDtgT/BUXp2AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T16:07:28.445958Z"},"content_sha256":"52fd6074dbe28518f6c86f06262262ced51b8ebb1db6d6bd60ef0a4bb668c278","schema_version":"1.0","event_id":"sha256:52fd6074dbe28518f6c86f06262262ced51b8ebb1db6d6bd60ef0a4bb668c278"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI/bundle.json","state_url":"https://pith.science/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-06T16:07:28Z","links":{"resolver":"https://pith.science/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI","bundle":"https://pith.science/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI/bundle.json","state":"https://pith.science/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JL6Q7LK6FJFZCNTEX5FXAHJDDI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:JL6Q7LK6FJFZCNTEX5FXAHJDDI","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"2350bf49b4c4106593fe83b49ea631071244a8c6f969c341a3b114116b9baaf8","cross_cats_sorted":["cs.AI","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-06-28T10:03:11Z","title_canon_sha256":"311d81cbf5ea90a69042573bc159c36ff2e33ad931f3ea5b4283d52f887da983"},"schema_version":"1.0","source":{"id":"2106.14885","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2106.14885","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"arxiv_version","alias_value":"2106.14885v1","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2106.14885","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"pith_short_12","alias_value":"JL6Q7LK6FJFZ","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"pith_short_16","alias_value":"JL6Q7LK6FJFZCNTE","created_at":"2026-07-05T03:14:35Z"},{"alias_kind":"pith_short_8","alias_value":"JL6Q7LK6","created_at":"2026-07-05T03:14:35Z"}],"graph_snapshots":[{"event_id":"sha256:52fd6074dbe28518f6c86f06262262ced51b8ebb1db6d6bd60ef0a4bb668c278","target":"graph","created_at":"2026-07-05T03:14:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2106.14885/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Advancing the state-of-the-art in large-scale biomedical semantic indexing and question answering is the main focus of the BioASQ challenge. BioASQ organizes respective tasks where different teams develop systems that are evaluated on the same benchmark datasets that represent the real information needs of experts in the biomedical domain. This paper presents an overview of the ninth edition of the BioASQ challenge in the context of the Conference and Labs of the Evaluation Forum (CLEF) 2021. In this year, a new question answering task, named Synergy, is introduced to support researchers study","authors_text":"Anastasia Krithara, Anastasios Nentidis, Eirini Vandorou, Georgios Katsimpras, Georgios Paliouras, Luis Gasco, Martin Krallinger","cross_cats":["cs.AI","cs.IR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-06-28T10:03:11Z","title":"Overview of BioASQ 2021: The ninth BioASQ challenge on Large-Scale Biomedical Semantic Indexing and Question Answering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.14885","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:861a05e887b948ca068b475a61798e84e919781b8d0443f255cb3955e0e58d03","target":"record","created_at":"2026-07-05T03:14:35Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"2350bf49b4c4106593fe83b49ea631071244a8c6f969c341a3b114116b9baaf8","cross_cats_sorted":["cs.AI","cs.IR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-06-28T10:03:11Z","title_canon_sha256":"311d81cbf5ea90a69042573bc159c36ff2e33ad931f3ea5b4283d52f887da983"},"schema_version":"1.0","source":{"id":"2106.14885","kind":"arxiv","version":1}},"canonical_sha256":"4afd0fad5e2a4b913664bf4b701d231a3d8b7a8aebdac3daa61fa15e681af82a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4afd0fad5e2a4b913664bf4b701d231a3d8b7a8aebdac3daa61fa15e681af82a","first_computed_at":"2026-07-05T03:14:35.508641Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:14:35.508641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oJoh4DwUcHbZ4R7jYXAitAAcOdLxVMXEig+84jk+wXxy64fHTTGWQrVCLB2J05rfUE8m8GLQCLbjMNd5enrIBw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:14:35.509097Z","signed_message":"canonical_sha256_bytes"},"source_id":"2106.14885","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:861a05e887b948ca068b475a61798e84e919781b8d0443f255cb3955e0e58d03","sha256:52fd6074dbe28518f6c86f06262262ced51b8ebb1db6d6bd60ef0a4bb668c278"],"state_sha256":"475f57b754237a7141e4b5536a2cf89ec927910e3f02f4c5937130157c4e48a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sgdinovMm9ZfXS1CnxvA5YoERpvKvRQTKD6RBAx9IzJRw79VRio9I1Mg4LAqmM0EEBh0YjOCXJso7z+e3O9kAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T16:07:28.450201Z","bundle_sha256":"a6eda4c5c3804254216b5487a755a7455bcfff7da1980b6b04f324fbc72a445d"}}