{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:S73DJNAIUYH3YIABQIJFCPPD5K","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":"df74b6190ef070258982688ba997b773adbcb34d04f0cf8715a33d4aa088deba","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2021-09-27T06:14:30Z","title_canon_sha256":"312910b07c0d54c193ba8765fa6064b3faedb1b33034a74a655cdb5023bab45c"},"schema_version":"1.0","source":{"id":"2109.12814","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.12814","created_at":"2026-07-05T04:08:58Z"},{"alias_kind":"arxiv_version","alias_value":"2109.12814v2","created_at":"2026-07-05T04:08:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.12814","created_at":"2026-07-05T04:08:58Z"},{"alias_kind":"pith_short_12","alias_value":"S73DJNAIUYH3","created_at":"2026-07-05T04:08:58Z"},{"alias_kind":"pith_short_16","alias_value":"S73DJNAIUYH3YIAB","created_at":"2026-07-05T04:08:58Z"},{"alias_kind":"pith_short_8","alias_value":"S73DJNAI","created_at":"2026-07-05T04:08:58Z"}],"graph_snapshots":[{"event_id":"sha256:28f8a40ad579bd3c211758e1c0c4b0abcdae4d0a6e4882c5372233fc4508e124","target":"graph","created_at":"2026-07-05T04:08:58Z","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/2109.12814/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Thanks to the strong representation power of neural encoders, neural chart-based parsers have achieved highly competitive performance by using local features. Recently, it has been shown that non-local features in CRF structures lead to improvements. In this paper, we investigate injecting non-local features into the training process of a local span-based parser, by predicting constituent n-gram non-local patterns and ensuring consistency between non-local patterns and local constituents. Results show that our simple method gives better results than the self-attentive parser on both PTB and CT","authors_text":"Leyang Cui, Sen Yang, Yue Zhang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2021-09-27T06:14:30Z","title":"Investigating Non-local Features for Neural Constituency Parsing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.12814","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:b8ce8c81154eff4fd90f6a92ea35ae1dfab35b37c363cf17244f5c784351feda","target":"record","created_at":"2026-07-05T04:08:58Z","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":"df74b6190ef070258982688ba997b773adbcb34d04f0cf8715a33d4aa088deba","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CL","submitted_at":"2021-09-27T06:14:30Z","title_canon_sha256":"312910b07c0d54c193ba8765fa6064b3faedb1b33034a74a655cdb5023bab45c"},"schema_version":"1.0","source":{"id":"2109.12814","kind":"arxiv","version":2}},"canonical_sha256":"97f634b408a60fbc20018212513de3ea83755fc57851a57cc1ffb0bff92a2690","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"97f634b408a60fbc20018212513de3ea83755fc57851a57cc1ffb0bff92a2690","first_computed_at":"2026-07-05T04:08:58.845080Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:08:58.845080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3dgrvBbB9NCRZIg3CHoEWYtyCFQ50CfZNxxpFOH0cRSk22Yrs/yT2Mk4qfiQ8xghmAe9X/7W6dLNxkVABqOfDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:08:58.845520Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.12814","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8ce8c81154eff4fd90f6a92ea35ae1dfab35b37c363cf17244f5c784351feda","sha256:28f8a40ad579bd3c211758e1c0c4b0abcdae4d0a6e4882c5372233fc4508e124"],"state_sha256":"57d19eec1ca653e8e9788dc01d16098b77db6221b10aa1b37d48ffd6600af8e9"}