{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:KYNDVHQZXTZQQWZBJ3XH6X5FJD","short_pith_number":"pith:KYNDVHQZ","canonical_record":{"source":{"id":"2010.04829","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-10-09T22:23:21Z","cross_cats_sorted":[],"title_canon_sha256":"ffa2b7aadfa2f59ee421e3fdb491b8be9b1d334db08bca5530be60a7e0be2293","abstract_canon_sha256":"f88e06baa4c3a77f8f65872e4f2ef9a727085bf66c65fe30410cc78a87310581"},"schema_version":"1.0"},"canonical_sha256":"561a3a9e19bcf3085b214eee7f5fa548f7949cb187dd05ea3ba51a7269ec0d04","source":{"kind":"arxiv","id":"2010.04829","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.04829","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"arxiv_version","alias_value":"2010.04829v2","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.04829","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"pith_short_12","alias_value":"KYNDVHQZXTZQ","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"KYNDVHQZXTZQQWZB","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"KYNDVHQZ","created_at":"2026-07-05T02:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:KYNDVHQZXTZQQWZBJ3XH6X5FJD","target":"record","payload":{"canonical_record":{"source":{"id":"2010.04829","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-10-09T22:23:21Z","cross_cats_sorted":[],"title_canon_sha256":"ffa2b7aadfa2f59ee421e3fdb491b8be9b1d334db08bca5530be60a7e0be2293","abstract_canon_sha256":"f88e06baa4c3a77f8f65872e4f2ef9a727085bf66c65fe30410cc78a87310581"},"schema_version":"1.0"},"canonical_sha256":"561a3a9e19bcf3085b214eee7f5fa548f7949cb187dd05ea3ba51a7269ec0d04","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:32:46.539540Z","signature_b64":"zmsMUvSKem929Q0cj7jcsVodnd6h6SN0WExo9b3Ze/W8OeUHv1YzspKlT9JasDI7USA48+cQt7yvRcvYtUPPCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"561a3a9e19bcf3085b214eee7f5fa548f7949cb187dd05ea3ba51a7269ec0d04","last_reissued_at":"2026-07-05T02:32:46.539119Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:32:46.539119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.04829","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:32:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JuPEZfjJX0VF4GVCreNda+SHTYFZmFP9jyCc63rb//okzSAU0sItL81qWgqzu5Wf2HlGTFdC5uejiyJhevV/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T18:55:50.088762Z"},"content_sha256":"98ae5724d4313ca35366dc5da90a8845d0761849e16bbbdf846a98d65145656c","schema_version":"1.0","event_id":"sha256:98ae5724d4313ca35366dc5da90a8845d0761849e16bbbdf846a98d65145656c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:KYNDVHQZXTZQQWZBJ3XH6X5FJD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Relation Classification as Two-way Span-Prediction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Amir DN Cohen, Shachar Rosenman, Yoav Goldberg","submitted_at":"2020-10-09T22:23:21Z","abstract_excerpt":"The current supervised relation classification (RC) task uses a single embedding to represent the relation between a pair of entities. We argue that a better approach is to treat the RC task as span-prediction (SP) problem, similar to Question answering (QA). We present a span-prediction based system for RC and evaluate its performance compared to the embedding based system. We demonstrate that the supervised SP objective works significantly better then the standard classification based objective. We achieve state-of-the-art results on the TACRED and SemEval task 8 datasets."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.04829","kind":"arxiv","version":2},"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/2010.04829/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":"2026-07-05T02:32:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W9FK26ytK8wlSguJ9inRHRbBFgjTxHjV9Ig4ggrA2lAJet7UnhMU+TbZB1cXub/XX2ewHaIgNhmR0znE0xLLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T18:55:50.089625Z"},"content_sha256":"a048ffb6aedc3260564cc325bc3883715b79c8cc3791ade44a85ab797d748149","schema_version":"1.0","event_id":"sha256:a048ffb6aedc3260564cc325bc3883715b79c8cc3791ade44a85ab797d748149"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD/bundle.json","state_url":"https://pith.science/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD/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":"2026-08-16T18:55:50Z","links":{"resolver":"https://pith.science/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD","bundle":"https://pith.science/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD/bundle.json","state":"https://pith.science/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KYNDVHQZXTZQQWZBJ3XH6X5FJD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:KYNDVHQZXTZQQWZBJ3XH6X5FJD","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":"f88e06baa4c3a77f8f65872e4f2ef9a727085bf66c65fe30410cc78a87310581","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-10-09T22:23:21Z","title_canon_sha256":"ffa2b7aadfa2f59ee421e3fdb491b8be9b1d334db08bca5530be60a7e0be2293"},"schema_version":"1.0","source":{"id":"2010.04829","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.04829","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"arxiv_version","alias_value":"2010.04829v2","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.04829","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"pith_short_12","alias_value":"KYNDVHQZXTZQ","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"KYNDVHQZXTZQQWZB","created_at":"2026-07-05T02:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"KYNDVHQZ","created_at":"2026-07-05T02:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:a048ffb6aedc3260564cc325bc3883715b79c8cc3791ade44a85ab797d748149","target":"graph","created_at":"2026-07-05T02:32:46Z","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/2010.04829/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The current supervised relation classification (RC) task uses a single embedding to represent the relation between a pair of entities. We argue that a better approach is to treat the RC task as span-prediction (SP) problem, similar to Question answering (QA). We present a span-prediction based system for RC and evaluate its performance compared to the embedding based system. We demonstrate that the supervised SP objective works significantly better then the standard classification based objective. We achieve state-of-the-art results on the TACRED and SemEval task 8 datasets.","authors_text":"Amir DN Cohen, Shachar Rosenman, Yoav Goldberg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-10-09T22:23:21Z","title":"Relation Classification as Two-way Span-Prediction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.04829","kind":"arxiv","version":2},"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":"sha256:98ae5724d4313ca35366dc5da90a8845d0761849e16bbbdf846a98d65145656c","target":"record","created_at":"2026-07-05T02:32:46Z","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":"f88e06baa4c3a77f8f65872e4f2ef9a727085bf66c65fe30410cc78a87310581","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-10-09T22:23:21Z","title_canon_sha256":"ffa2b7aadfa2f59ee421e3fdb491b8be9b1d334db08bca5530be60a7e0be2293"},"schema_version":"1.0","source":{"id":"2010.04829","kind":"arxiv","version":2}},"canonical_sha256":"561a3a9e19bcf3085b214eee7f5fa548f7949cb187dd05ea3ba51a7269ec0d04","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"561a3a9e19bcf3085b214eee7f5fa548f7949cb187dd05ea3ba51a7269ec0d04","first_computed_at":"2026-07-05T02:32:46.539119Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:32:46.539119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zmsMUvSKem929Q0cj7jcsVodnd6h6SN0WExo9b3Ze/W8OeUHv1YzspKlT9JasDI7USA48+cQt7yvRcvYtUPPCg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:32:46.539540Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.04829","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:98ae5724d4313ca35366dc5da90a8845d0761849e16bbbdf846a98d65145656c","sha256:a048ffb6aedc3260564cc325bc3883715b79c8cc3791ade44a85ab797d748149"],"state_sha256":"35876f1cf461ba120c2351eb4a041f9bf93005054465fba69914f376988a6e70"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/GXRzmdDMUNB5jUHP6ya9TbaG/ETeBNXgLFuDqXPxiLH+k6GXmQhSBR9tiohRFC07+XYPd7rMmIvhV3r1KsyAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T18:55:50.094980Z","bundle_sha256":"2e47fd048f6303e7db0cbca54018a8b97584f7513e4f406be5234413f679e7c4"}}