{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:RSFI2LYJM5KRY6MSK4K4633HWX","short_pith_number":"pith:RSFI2LYJ","canonical_record":{"source":{"id":"2011.03435","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-11-06T15:31:07Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"b33ec1b2be58478c6a35cba7b18572c049948a171db7bb535305ee1f38417335","abstract_canon_sha256":"b7f79169b7dbbcc22a0520a8ebf831b33721c104388c42f30b4b9c3d3f440676"},"schema_version":"1.0"},"canonical_sha256":"8c8a8d2f0967551c79925715cf6f67b5f9af29966ff4e8635d3ac1d75d62ec8c","source":{"kind":"arxiv","id":"2011.03435","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.03435","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"arxiv_version","alias_value":"2011.03435v1","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.03435","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"pith_short_12","alias_value":"RSFI2LYJM5KR","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"pith_short_16","alias_value":"RSFI2LYJM5KRY6MS","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"pith_short_8","alias_value":"RSFI2LYJ","created_at":"2026-07-05T01:49:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:RSFI2LYJM5KRY6MSK4K4633HWX","target":"record","payload":{"canonical_record":{"source":{"id":"2011.03435","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-11-06T15:31:07Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"b33ec1b2be58478c6a35cba7b18572c049948a171db7bb535305ee1f38417335","abstract_canon_sha256":"b7f79169b7dbbcc22a0520a8ebf831b33721c104388c42f30b4b9c3d3f440676"},"schema_version":"1.0"},"canonical_sha256":"8c8a8d2f0967551c79925715cf6f67b5f9af29966ff4e8635d3ac1d75d62ec8c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:49:43.060876Z","signature_b64":"XPIhLREh26VNmwOG1V3t1UHF2K3QLsEE4DyRBRgguFz874oYqOvOs09zDrDO5lWYdIf6eFgVG6xVD71uDS5FDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8c8a8d2f0967551c79925715cf6f67b5f9af29966ff4e8635d3ac1d75d62ec8c","last_reissued_at":"2026-07-05T01:49:43.060482Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:49:43.060482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.03435","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":"2026-07-05T01:49:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YgSuUBSmCK5YG4yUk8D7XoqbmezxqZD5wkXVoIqLiTkqD7+pQMrnWxRI6m5zG3KDbIqqJHwYfColG4zPXqgnDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T10:01:02.999158Z"},"content_sha256":"8882b9e565f871092ef20d5a4ac8d372368018cafa692ae97c78d1d2364cd2e2","schema_version":"1.0","event_id":"sha256:8882b9e565f871092ef20d5a4ac8d372368018cafa692ae97c78d1d2364cd2e2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:RSFI2LYJM5KRY6MSK4K4633HWX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Answer Span Correction in Machine Reading Comprehension","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","cs.LG"],"primary_cat":"cs.CL","authors_text":"Avirup Sil, Efsun Sarioglu Kayi, Md Arafat Sultan, Revanth Gangi Reddy, Rong Zhang, Vittorio Castelli","submitted_at":"2020-11-06T15:31:07Z","abstract_excerpt":"Answer validation in machine reading comprehension (MRC) consists of verifying an extracted answer against an input context and question pair. Previous work has looked at re-assessing the \"answerability\" of the question given the extracted answer. Here we address a different problem: the tendency of existing MRC systems to produce partially correct answers when presented with answerable questions. We explore the nature of such errors and propose a post-processing correction method that yields statistically significant performance improvements over state-of-the-art MRC systems in both monolingu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.03435","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/2011.03435/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":"2026-07-05T01:49:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8YQOXms8UAYNspgvuo5tMPsteT+La86Sry9jmsVn3fu6eIdbTgGojsR6/8pKr56OcQqvkkDGAEwahnH4rHkACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T10:01:02.999559Z"},"content_sha256":"b267450b73ede653328b4b7486dd128e598877389a22bbdb2fa49bb7424db988","schema_version":"1.0","event_id":"sha256:b267450b73ede653328b4b7486dd128e598877389a22bbdb2fa49bb7424db988"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RSFI2LYJM5KRY6MSK4K4633HWX/bundle.json","state_url":"https://pith.science/pith/RSFI2LYJM5KRY6MSK4K4633HWX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RSFI2LYJM5KRY6MSK4K4633HWX/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":"2026-07-07T10:01:03Z","links":{"resolver":"https://pith.science/pith/RSFI2LYJM5KRY6MSK4K4633HWX","bundle":"https://pith.science/pith/RSFI2LYJM5KRY6MSK4K4633HWX/bundle.json","state":"https://pith.science/pith/RSFI2LYJM5KRY6MSK4K4633HWX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RSFI2LYJM5KRY6MSK4K4633HWX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:RSFI2LYJM5KRY6MSK4K4633HWX","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":"b7f79169b7dbbcc22a0520a8ebf831b33721c104388c42f30b4b9c3d3f440676","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-11-06T15:31:07Z","title_canon_sha256":"b33ec1b2be58478c6a35cba7b18572c049948a171db7bb535305ee1f38417335"},"schema_version":"1.0","source":{"id":"2011.03435","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.03435","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"arxiv_version","alias_value":"2011.03435v1","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.03435","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"pith_short_12","alias_value":"RSFI2LYJM5KR","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"pith_short_16","alias_value":"RSFI2LYJM5KRY6MS","created_at":"2026-07-05T01:49:43Z"},{"alias_kind":"pith_short_8","alias_value":"RSFI2LYJ","created_at":"2026-07-05T01:49:43Z"}],"graph_snapshots":[{"event_id":"sha256:b267450b73ede653328b4b7486dd128e598877389a22bbdb2fa49bb7424db988","target":"graph","created_at":"2026-07-05T01:49:43Z","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/2011.03435/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Answer validation in machine reading comprehension (MRC) consists of verifying an extracted answer against an input context and question pair. Previous work has looked at re-assessing the \"answerability\" of the question given the extracted answer. Here we address a different problem: the tendency of existing MRC systems to produce partially correct answers when presented with answerable questions. We explore the nature of such errors and propose a post-processing correction method that yields statistically significant performance improvements over state-of-the-art MRC systems in both monolingu","authors_text":"Avirup Sil, Efsun Sarioglu Kayi, Md Arafat Sultan, Revanth Gangi Reddy, Rong Zhang, Vittorio Castelli","cross_cats":["cs.AI","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-11-06T15:31:07Z","title":"Answer Span Correction in Machine Reading Comprehension"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.03435","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":"sha256:8882b9e565f871092ef20d5a4ac8d372368018cafa692ae97c78d1d2364cd2e2","target":"record","created_at":"2026-07-05T01:49:43Z","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":"b7f79169b7dbbcc22a0520a8ebf831b33721c104388c42f30b4b9c3d3f440676","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-11-06T15:31:07Z","title_canon_sha256":"b33ec1b2be58478c6a35cba7b18572c049948a171db7bb535305ee1f38417335"},"schema_version":"1.0","source":{"id":"2011.03435","kind":"arxiv","version":1}},"canonical_sha256":"8c8a8d2f0967551c79925715cf6f67b5f9af29966ff4e8635d3ac1d75d62ec8c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c8a8d2f0967551c79925715cf6f67b5f9af29966ff4e8635d3ac1d75d62ec8c","first_computed_at":"2026-07-05T01:49:43.060482Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:49:43.060482Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XPIhLREh26VNmwOG1V3t1UHF2K3QLsEE4DyRBRgguFz874oYqOvOs09zDrDO5lWYdIf6eFgVG6xVD71uDS5FDw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:49:43.060876Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.03435","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8882b9e565f871092ef20d5a4ac8d372368018cafa692ae97c78d1d2364cd2e2","sha256:b267450b73ede653328b4b7486dd128e598877389a22bbdb2fa49bb7424db988"],"state_sha256":"7f46e771906cfeb81547332241a6553d07bb377b5b3062fb6ad81d4d6aea62da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/6I8SmtW3ZNOjry4o233Fk4U+O8syhVJwP0C/gXjHeNr1oqOeW6vAlwMte24SlGoGIkIm3mhaik8TI7Tv/MBCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T10:01:03.001576Z","bundle_sha256":"a73c05fd555363bff6efa74e3de2e5a6bf798762d0dc3cf8850d279b02a0ef22"}}