{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:OFCJFTA3L3XSVJRITVTSN55I3G","short_pith_number":"pith:OFCJFTA3","canonical_record":{"source":{"id":"2102.01373","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-02-02T07:57:06Z","cross_cats_sorted":[],"title_canon_sha256":"966d2bde772d7a750b30bed712b5ffa63793b48f095c88d767a19e242dc5331e","abstract_canon_sha256":"d198bb7c84a485f466cdec425b7edeaf055c1445b3796a240950e25f50b7f382"},"schema_version":"1.0"},"canonical_sha256":"714492cc1b5eef2aa6289d6726f7a8d9ac6d1f99a52b21e38d632efb0db0b816","source":{"kind":"arxiv","id":"2102.01373","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.01373","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"arxiv_version","alias_value":"2102.01373v4","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.01373","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"pith_short_12","alias_value":"OFCJFTA3L3XS","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"pith_short_16","alias_value":"OFCJFTA3L3XSVJRI","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"pith_short_8","alias_value":"OFCJFTA3","created_at":"2026-07-05T04:59:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:OFCJFTA3L3XSVJRITVTSN55I3G","target":"record","payload":{"canonical_record":{"source":{"id":"2102.01373","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-02-02T07:57:06Z","cross_cats_sorted":[],"title_canon_sha256":"966d2bde772d7a750b30bed712b5ffa63793b48f095c88d767a19e242dc5331e","abstract_canon_sha256":"d198bb7c84a485f466cdec425b7edeaf055c1445b3796a240950e25f50b7f382"},"schema_version":"1.0"},"canonical_sha256":"714492cc1b5eef2aa6289d6726f7a8d9ac6d1f99a52b21e38d632efb0db0b816","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:59:56.705753Z","signature_b64":"YG3+OqTdFjvEvbRp5GwtWNr/u2kZJRbLKRH9aHrgTSBxkih8hhLjK0/ICUexLtqVXSLU1laDlN6rqIpARoRRDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"714492cc1b5eef2aa6289d6726f7a8d9ac6d1f99a52b21e38d632efb0db0b816","last_reissued_at":"2026-07-05T04:59:56.705328Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:59:56.705328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.01373","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:59:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G5fKrK0vBcyLOAuAjHWAMPUv5ndbQCIlfynNqmDPMuXFTbXtxh/JBj3Lj5oArvjAD9189EOUIGsEaOEfKaRcCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T18:30:00.962318Z"},"content_sha256":"d19a1f44763f4d9758def8052b399d7d308b967fc7b1eaa6d871e53cd85a4c8c","schema_version":"1.0","event_id":"sha256:d19a1f44763f4d9758def8052b399d7d308b967fc7b1eaa6d871e53cd85a4c8c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:OFCJFTA3L3XSVJRITVTSN55I3G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Improved Baseline for Sentence-level Relation Extraction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Muhao Chen, Wenxuan Zhou","submitted_at":"2021-02-02T07:57:06Z","abstract_excerpt":"Sentence-level relation extraction (RE) aims at identifying the relationship between two entities in a sentence. Many efforts have been devoted to this problem, while the best performing methods are still far from perfect. In this paper, we revisit two problems that affect the performance of existing RE models, namely entity representation and noisy or ill-defined labels. Our improved RE baseline, incorporated with entity representations with typed markers, achieves an F1 of 74.6% on TACRED, significantly outperforms previous SOTA methods. Furthermore, the presented new baseline achieves an F1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.01373","kind":"arxiv","version":4},"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/2102.01373/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":"2026-07-05T04:59:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qIps2nR55CMwr2oFqO3HCfpTKP//MRWIDkhzmWpMHBxHV2FJyCVy8cmqhdu/gvYI4sLEa0CjtlSHQdyik8JQCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T18:30:00.962882Z"},"content_sha256":"5693788cb16faeb58153db7c5d67253dc026973aa85950000c939704ea7e00bc","schema_version":"1.0","event_id":"sha256:5693788cb16faeb58153db7c5d67253dc026973aa85950000c939704ea7e00bc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OFCJFTA3L3XSVJRITVTSN55I3G/bundle.json","state_url":"https://pith.science/pith/OFCJFTA3L3XSVJRITVTSN55I3G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OFCJFTA3L3XSVJRITVTSN55I3G/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":"2026-08-09T18:30:00Z","links":{"resolver":"https://pith.science/pith/OFCJFTA3L3XSVJRITVTSN55I3G","bundle":"https://pith.science/pith/OFCJFTA3L3XSVJRITVTSN55I3G/bundle.json","state":"https://pith.science/pith/OFCJFTA3L3XSVJRITVTSN55I3G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OFCJFTA3L3XSVJRITVTSN55I3G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:OFCJFTA3L3XSVJRITVTSN55I3G","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":"d198bb7c84a485f466cdec425b7edeaf055c1445b3796a240950e25f50b7f382","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-02-02T07:57:06Z","title_canon_sha256":"966d2bde772d7a750b30bed712b5ffa63793b48f095c88d767a19e242dc5331e"},"schema_version":"1.0","source":{"id":"2102.01373","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.01373","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"arxiv_version","alias_value":"2102.01373v4","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.01373","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"pith_short_12","alias_value":"OFCJFTA3L3XS","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"pith_short_16","alias_value":"OFCJFTA3L3XSVJRI","created_at":"2026-07-05T04:59:56Z"},{"alias_kind":"pith_short_8","alias_value":"OFCJFTA3","created_at":"2026-07-05T04:59:56Z"}],"graph_snapshots":[{"event_id":"sha256:5693788cb16faeb58153db7c5d67253dc026973aa85950000c939704ea7e00bc","target":"graph","created_at":"2026-07-05T04:59:56Z","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/2102.01373/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Sentence-level relation extraction (RE) aims at identifying the relationship between two entities in a sentence. Many efforts have been devoted to this problem, while the best performing methods are still far from perfect. In this paper, we revisit two problems that affect the performance of existing RE models, namely entity representation and noisy or ill-defined labels. Our improved RE baseline, incorporated with entity representations with typed markers, achieves an F1 of 74.6% on TACRED, significantly outperforms previous SOTA methods. Furthermore, the presented new baseline achieves an F1","authors_text":"Muhao Chen, Wenxuan Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-02-02T07:57:06Z","title":"An Improved Baseline for Sentence-level Relation Extraction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.01373","kind":"arxiv","version":4},"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:d19a1f44763f4d9758def8052b399d7d308b967fc7b1eaa6d871e53cd85a4c8c","target":"record","created_at":"2026-07-05T04:59:56Z","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":"d198bb7c84a485f466cdec425b7edeaf055c1445b3796a240950e25f50b7f382","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-02-02T07:57:06Z","title_canon_sha256":"966d2bde772d7a750b30bed712b5ffa63793b48f095c88d767a19e242dc5331e"},"schema_version":"1.0","source":{"id":"2102.01373","kind":"arxiv","version":4}},"canonical_sha256":"714492cc1b5eef2aa6289d6726f7a8d9ac6d1f99a52b21e38d632efb0db0b816","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"714492cc1b5eef2aa6289d6726f7a8d9ac6d1f99a52b21e38d632efb0db0b816","first_computed_at":"2026-07-05T04:59:56.705328Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:59:56.705328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YG3+OqTdFjvEvbRp5GwtWNr/u2kZJRbLKRH9aHrgTSBxkih8hhLjK0/ICUexLtqVXSLU1laDlN6rqIpARoRRDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:59:56.705753Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.01373","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d19a1f44763f4d9758def8052b399d7d308b967fc7b1eaa6d871e53cd85a4c8c","sha256:5693788cb16faeb58153db7c5d67253dc026973aa85950000c939704ea7e00bc"],"state_sha256":"efbcbf3077aa2f8602c4f69a7300b1b02b7b59722d4532a5be893504eb33b78c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gr33icH+42renYuWVip6IubLRUskbhxiR+r1ZaamGgCb7YIRC/W7K9/QxqTautQya3b7m5MOyVEeDIyZI1dXCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T18:30:00.970046Z","bundle_sha256":"1b4c6d3e6a277a9b1e8f83f6746896556fec66497333bbc71825d8e73dc3f77b"}}