{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:KNNFNPE2DBRX3ZZLPNHKNTMDWG","short_pith_number":"pith:KNNFNPE2","canonical_record":{"source":{"id":"1910.08282","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2019-10-18T06:49:55Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"6913ba163269a808d2b2243ed434d30e77858bc5c17424f4b9dbae2b994ce5bc","abstract_canon_sha256":"57b8c1e8f813cafbce906f452999272093d6ec7c6f4dd87565dcf1c44ff221fe"},"schema_version":"1.0"},"canonical_sha256":"535a56bc9a18637de72b7b4ea6cd83b196ad5cf1cf1c2e7f72cb5ddc02b667e9","source":{"kind":"arxiv","id":"1910.08282","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.08282","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"arxiv_version","alias_value":"1910.08282v2","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.08282","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"pith_short_12","alias_value":"KNNFNPE2DBRX","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"pith_short_16","alias_value":"KNNFNPE2DBRX3ZZL","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"pith_short_8","alias_value":"KNNFNPE2","created_at":"2026-07-05T00:15:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:KNNFNPE2DBRX3ZZLPNHKNTMDWG","target":"record","payload":{"canonical_record":{"source":{"id":"1910.08282","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2019-10-18T06:49:55Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"6913ba163269a808d2b2243ed434d30e77858bc5c17424f4b9dbae2b994ce5bc","abstract_canon_sha256":"57b8c1e8f813cafbce906f452999272093d6ec7c6f4dd87565dcf1c44ff221fe"},"schema_version":"1.0"},"canonical_sha256":"535a56bc9a18637de72b7b4ea6cd83b196ad5cf1cf1c2e7f72cb5ddc02b667e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:15:51.207971Z","signature_b64":"8Y7xdoPnO+w2bSwoQbSsW7KxGHwID+ZR/+et07zoUzm6aKXalcYQKjMzcfO09QgBweKuR2WdaYSGVcDswKN4BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"535a56bc9a18637de72b7b4ea6cd83b196ad5cf1cf1c2e7f72cb5ddc02b667e9","last_reissued_at":"2026-07-05T00:15:51.207551Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:15:51.207551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1910.08282","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":"2026-07-05T00:15:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wl4BzvYzcbQC8CD2zv6VoyoIYqyiR2r2+rPPoldFYBBpVcQkHrzIAuEAsgkm3ZVZAeDXGyqrdLbzyKRpZI9cAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T22:45:20.596378Z"},"content_sha256":"4d947c1da6c1b349aa6a606d94268ac119685b59c3a9b81639618cffda2c85cd","schema_version":"1.0","event_id":"sha256:4d947c1da6c1b349aa6a606d94268ac119685b59c3a9b81639618cffda2c85cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:KNNFNPE2DBRX3ZZLPNHKNTMDWG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unsupervised Context Rewriting for Open Domain Conversation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","cs.LG"],"primary_cat":"cs.CL","authors_text":"Jingsong Yu, Kai Zhang, Kun Zhou, Shujie Liu, Yu Wu","submitted_at":"2019-10-18T06:49:55Z","abstract_excerpt":"Context modeling has a pivotal role in open domain conversation. Existing works either use heuristic methods or jointly learn context modeling and response generation with an encoder-decoder framework. This paper proposes an explicit context rewriting method, which rewrites the last utterance by considering context history. We leverage pseudo-parallel data and elaborate a context rewriting network, which is built upon the CopyNet with the reinforcement learning method. The rewritten utterance is beneficial to candidate retrieval, explainable context modeling, as well as enabling to employ a si"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.08282","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/1910.08282/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":"2026-07-05T00:15:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ljzTOj0ERHCh3dxrWMTgteQc7dJa36ypl5F3u87y+ZhkgxX33a9K2lbwFH8h5ESSmbwneo3gAA1EdazQTzEuDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T22:45:20.596886Z"},"content_sha256":"740fce0cf03f1377cad3769de46ff28b809ef5fe309c27a4c994c62a30204115","schema_version":"1.0","event_id":"sha256:740fce0cf03f1377cad3769de46ff28b809ef5fe309c27a4c994c62a30204115"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG/bundle.json","state_url":"https://pith.science/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG/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":"2026-08-07T22:45:20Z","links":{"resolver":"https://pith.science/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG","bundle":"https://pith.science/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG/bundle.json","state":"https://pith.science/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KNNFNPE2DBRX3ZZLPNHKNTMDWG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KNNFNPE2DBRX3ZZLPNHKNTMDWG","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":"57b8c1e8f813cafbce906f452999272093d6ec7c6f4dd87565dcf1c44ff221fe","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2019-10-18T06:49:55Z","title_canon_sha256":"6913ba163269a808d2b2243ed434d30e77858bc5c17424f4b9dbae2b994ce5bc"},"schema_version":"1.0","source":{"id":"1910.08282","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.08282","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"arxiv_version","alias_value":"1910.08282v2","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.08282","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"pith_short_12","alias_value":"KNNFNPE2DBRX","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"pith_short_16","alias_value":"KNNFNPE2DBRX3ZZL","created_at":"2026-07-05T00:15:51Z"},{"alias_kind":"pith_short_8","alias_value":"KNNFNPE2","created_at":"2026-07-05T00:15:51Z"}],"graph_snapshots":[{"event_id":"sha256:740fce0cf03f1377cad3769de46ff28b809ef5fe309c27a4c994c62a30204115","target":"graph","created_at":"2026-07-05T00:15:51Z","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/1910.08282/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Context modeling has a pivotal role in open domain conversation. Existing works either use heuristic methods or jointly learn context modeling and response generation with an encoder-decoder framework. This paper proposes an explicit context rewriting method, which rewrites the last utterance by considering context history. We leverage pseudo-parallel data and elaborate a context rewriting network, which is built upon the CopyNet with the reinforcement learning method. The rewritten utterance is beneficial to candidate retrieval, explainable context modeling, as well as enabling to employ a si","authors_text":"Jingsong Yu, Kai Zhang, Kun Zhou, Shujie Liu, Yu Wu","cross_cats":["cs.AI","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2019-10-18T06:49:55Z","title":"Unsupervised Context Rewriting for Open Domain Conversation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.08282","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":"sha256:4d947c1da6c1b349aa6a606d94268ac119685b59c3a9b81639618cffda2c85cd","target":"record","created_at":"2026-07-05T00:15:51Z","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":"57b8c1e8f813cafbce906f452999272093d6ec7c6f4dd87565dcf1c44ff221fe","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2019-10-18T06:49:55Z","title_canon_sha256":"6913ba163269a808d2b2243ed434d30e77858bc5c17424f4b9dbae2b994ce5bc"},"schema_version":"1.0","source":{"id":"1910.08282","kind":"arxiv","version":2}},"canonical_sha256":"535a56bc9a18637de72b7b4ea6cd83b196ad5cf1cf1c2e7f72cb5ddc02b667e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"535a56bc9a18637de72b7b4ea6cd83b196ad5cf1cf1c2e7f72cb5ddc02b667e9","first_computed_at":"2026-07-05T00:15:51.207551Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:15:51.207551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8Y7xdoPnO+w2bSwoQbSsW7KxGHwID+ZR/+et07zoUzm6aKXalcYQKjMzcfO09QgBweKuR2WdaYSGVcDswKN4BA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:15:51.207971Z","signed_message":"canonical_sha256_bytes"},"source_id":"1910.08282","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d947c1da6c1b349aa6a606d94268ac119685b59c3a9b81639618cffda2c85cd","sha256:740fce0cf03f1377cad3769de46ff28b809ef5fe309c27a4c994c62a30204115"],"state_sha256":"5664f4a33bf8a9314423e2f6dfc22998c8db789a8cd6b7f745c7f9ff6f72c238"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qhf9IsigjKsGwlU73AQ721LXMJTPv1XulUM+rgS/lDTwz3Wv8uHk5vtY2zQfbs0M5Cid4bmDzJc0Ti5uRBikBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T22:45:20.602138Z","bundle_sha256":"0ea375e86c3f57e8419f11c3208846a4bdbab8f8aa943a94ce87b7563e659f4e"}}