{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:K2ER6VMNANLSWSD6OVZRHZSDVX","short_pith_number":"pith:K2ER6VMN","schema_version":"1.0","canonical_sha256":"56891f558d03572b487e757313e643addfe2022c3c201ab1443a624d9debd684","source":{"kind":"arxiv","id":"2107.06905","version":1},"attestation_state":"computed","paper":{"title":"Transition-based Bubble Parsing: Improvements on Coordination Structure Prediction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Lillian Lee, Tianze Shi","submitted_at":"2021-07-14T18:00:05Z","abstract_excerpt":"We propose a transition-based bubble parser to perform coordination structure identification and dependency-based syntactic analysis simultaneously. Bubble representations were proposed in the formal linguistics literature decades ago; they enhance dependency trees by encoding coordination boundaries and internal relationships within coordination structures explicitly. In this paper, we introduce a transition system and neural models for parsing these bubble-enhanced structures. Experimental results on the English Penn Treebank and the English GENIA corpus show that our parsers beat previous s"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2107.06905","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2021-07-14T18:00:05Z","cross_cats_sorted":[],"title_canon_sha256":"c004b0cf6855a6b77b4898a17bc5303e4f346f78c40bdf297bc1759a4e98b296","abstract_canon_sha256":"b726eea0ef1d4c3038bc703679d12367717e1f776fce9837b41607290cef06ad"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:58:07.995020Z","signature_b64":"t0B1LkGdaYmxzTn1NOUHkGJdAnmdud0UrccKwLLwoOj1NkKeXizHGB3U8Rn4BgJqSHYibQ7Vy5s+C/3xq5poAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"56891f558d03572b487e757313e643addfe2022c3c201ab1443a624d9debd684","last_reissued_at":"2026-07-05T02:58:07.994668Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:58:07.994668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Transition-based Bubble Parsing: Improvements on Coordination Structure Prediction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CL","authors_text":"Lillian Lee, Tianze Shi","submitted_at":"2021-07-14T18:00:05Z","abstract_excerpt":"We propose a transition-based bubble parser to perform coordination structure identification and dependency-based syntactic analysis simultaneously. Bubble representations were proposed in the formal linguistics literature decades ago; they enhance dependency trees by encoding coordination boundaries and internal relationships within coordination structures explicitly. In this paper, we introduce a transition system and neural models for parsing these bubble-enhanced structures. Experimental results on the English Penn Treebank and the English GENIA corpus show that our parsers beat previous s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.06905","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/2107.06905/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2107.06905","created_at":"2026-07-05T02:58:07.994728+00:00"},{"alias_kind":"arxiv_version","alias_value":"2107.06905v1","created_at":"2026-07-05T02:58:07.994728+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.06905","created_at":"2026-07-05T02:58:07.994728+00:00"},{"alias_kind":"pith_short_12","alias_value":"K2ER6VMNANLS","created_at":"2026-07-05T02:58:07.994728+00:00"},{"alias_kind":"pith_short_16","alias_value":"K2ER6VMNANLSWSD6","created_at":"2026-07-05T02:58:07.994728+00:00"},{"alias_kind":"pith_short_8","alias_value":"K2ER6VMN","created_at":"2026-07-05T02:58:07.994728+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX","json":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX.json","graph_json":"https://pith.science/api/pith-number/K2ER6VMNANLSWSD6OVZRHZSDVX/graph.json","events_json":"https://pith.science/api/pith-number/K2ER6VMNANLSWSD6OVZRHZSDVX/events.json","paper":"https://pith.science/paper/K2ER6VMN"},"agent_actions":{"view_html":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX","download_json":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX.json","view_paper":"https://pith.science/paper/K2ER6VMN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2107.06905&json=true","fetch_graph":"https://pith.science/api/pith-number/K2ER6VMNANLSWSD6OVZRHZSDVX/graph.json","fetch_events":"https://pith.science/api/pith-number/K2ER6VMNANLSWSD6OVZRHZSDVX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX/action/storage_attestation","attest_author":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX/action/author_attestation","sign_citation":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX/action/citation_signature","submit_replication":"https://pith.science/pith/K2ER6VMNANLSWSD6OVZRHZSDVX/action/replication_record"}},"created_at":"2026-07-05T02:58:07.994728+00:00","updated_at":"2026-07-05T02:58:07.994728+00:00"}