{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:5IM7G3VCHROTSDX6YRXCLDZOJ3","short_pith_number":"pith:5IM7G3VC","canonical_record":{"source":{"id":"1609.09007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2016-09-28T16:55:52Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"8d39c8c86e07fa784428bc9f4a8fdacb720ec14d7cb72f61d948c171f18a47ae","abstract_canon_sha256":"a56cf3ead74e1a33e11f0462ff77e51e2c6546dc93700acbb8cfc301b7dc7596"},"schema_version":"1.0"},"canonical_sha256":"ea19f36ea23c5d390efec46e258f2e4ec88d49a5d3915e617c923ce452aa84ba","source":{"kind":"arxiv","id":"1609.09007","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.09007","created_at":"2026-05-18T01:03:41Z"},{"alias_kind":"arxiv_version","alias_value":"1609.09007v1","created_at":"2026-05-18T01:03:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.09007","created_at":"2026-05-18T01:03:41Z"},{"alias_kind":"pith_short_12","alias_value":"5IM7G3VCHROT","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5IM7G3VCHROTSDX6","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5IM7G3VC","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:5IM7G3VCHROTSDX6YRXCLDZOJ3","target":"record","payload":{"canonical_record":{"source":{"id":"1609.09007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2016-09-28T16:55:52Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"8d39c8c86e07fa784428bc9f4a8fdacb720ec14d7cb72f61d948c171f18a47ae","abstract_canon_sha256":"a56cf3ead74e1a33e11f0462ff77e51e2c6546dc93700acbb8cfc301b7dc7596"},"schema_version":"1.0"},"canonical_sha256":"ea19f36ea23c5d390efec46e258f2e4ec88d49a5d3915e617c923ce452aa84ba","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:03:41.418952Z","signature_b64":"/R0vqmVwNkYH+y/Ki1xd4z0bFm1qSBRjwynzh9r25ivj5EoAIHOz+Lz1BNuTNuqYsHkwHidxzwxrQ8xPNkjUAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea19f36ea23c5d390efec46e258f2e4ec88d49a5d3915e617c923ce452aa84ba","last_reissued_at":"2026-05-18T01:03:41.418459Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:03:41.418459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.09007","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":"2026-05-18T01:03:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M3SVw0+0xR6UmB2whcMHvMYbs0CP95rDC3x/ccDAnjLEdZFSMiDzzUirrS/pSzxIq9m85UNv9Cnr6jXyjILhBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T07:33:47.602472Z"},"content_sha256":"51454bb46c454c48a16f8f82215000610eb1e319776cf10e086da147a8983c1b","schema_version":"1.0","event_id":"sha256:51454bb46c454c48a16f8f82215000610eb1e319776cf10e086da147a8983c1b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:5IM7G3VCHROTSDX6YRXCLDZOJ3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unsupervised Neural Hidden Markov Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cs.CL","authors_text":"Ashish Vaswani, Daniel Marcu, Ke Tran, Kevin Knight, Yonatan Bisk","submitted_at":"2016-09-28T16:55:52Z","abstract_excerpt":"In this work, we present the first results for neuralizing an Unsupervised Hidden Markov Model. We evaluate our approach on tag in- duction. Our approach outperforms existing generative models and is competitive with the state-of-the-art though with a simpler model easily extended to include additional context."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.09007","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":""},"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":"2026-05-18T01:03:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XXbZENWDeHQRcbF6D/Pz8Y/AvMt+ai5WHiukpxDhJsnXuUT5oB9qZziYhFy3+yzt1J9PDubD1lQjBSoSHlBxCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T07:33:47.602818Z"},"content_sha256":"aade6f230c279af7b998b7d3557c3e833f89d8b97d4c9f598ff8f6d0e2623e18","schema_version":"1.0","event_id":"sha256:aade6f230c279af7b998b7d3557c3e833f89d8b97d4c9f598ff8f6d0e2623e18"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3/bundle.json","state_url":"https://pith.science/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3/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":"2026-05-20T07:33:47Z","links":{"resolver":"https://pith.science/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3","bundle":"https://pith.science/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3/bundle.json","state":"https://pith.science/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5IM7G3VCHROTSDX6YRXCLDZOJ3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:5IM7G3VCHROTSDX6YRXCLDZOJ3","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":"a56cf3ead74e1a33e11f0462ff77e51e2c6546dc93700acbb8cfc301b7dc7596","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2016-09-28T16:55:52Z","title_canon_sha256":"8d39c8c86e07fa784428bc9f4a8fdacb720ec14d7cb72f61d948c171f18a47ae"},"schema_version":"1.0","source":{"id":"1609.09007","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.09007","created_at":"2026-05-18T01:03:41Z"},{"alias_kind":"arxiv_version","alias_value":"1609.09007v1","created_at":"2026-05-18T01:03:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.09007","created_at":"2026-05-18T01:03:41Z"},{"alias_kind":"pith_short_12","alias_value":"5IM7G3VCHROT","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"5IM7G3VCHROTSDX6","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"5IM7G3VC","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:aade6f230c279af7b998b7d3557c3e833f89d8b97d4c9f598ff8f6d0e2623e18","target":"graph","created_at":"2026-05-18T01:03:41Z","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"},"paper":{"abstract_excerpt":"In this work, we present the first results for neuralizing an Unsupervised Hidden Markov Model. We evaluate our approach on tag in- duction. Our approach outperforms existing generative models and is competitive with the state-of-the-art though with a simpler model easily extended to include additional context.","authors_text":"Ashish Vaswani, Daniel Marcu, Ke Tran, Kevin Knight, Yonatan Bisk","cross_cats":["cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2016-09-28T16:55:52Z","title":"Unsupervised Neural Hidden Markov Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.09007","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":"sha256:51454bb46c454c48a16f8f82215000610eb1e319776cf10e086da147a8983c1b","target":"record","created_at":"2026-05-18T01:03:41Z","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":"a56cf3ead74e1a33e11f0462ff77e51e2c6546dc93700acbb8cfc301b7dc7596","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2016-09-28T16:55:52Z","title_canon_sha256":"8d39c8c86e07fa784428bc9f4a8fdacb720ec14d7cb72f61d948c171f18a47ae"},"schema_version":"1.0","source":{"id":"1609.09007","kind":"arxiv","version":1}},"canonical_sha256":"ea19f36ea23c5d390efec46e258f2e4ec88d49a5d3915e617c923ce452aa84ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ea19f36ea23c5d390efec46e258f2e4ec88d49a5d3915e617c923ce452aa84ba","first_computed_at":"2026-05-18T01:03:41.418459Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:03:41.418459Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/R0vqmVwNkYH+y/Ki1xd4z0bFm1qSBRjwynzh9r25ivj5EoAIHOz+Lz1BNuTNuqYsHkwHidxzwxrQ8xPNkjUAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:03:41.418952Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.09007","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:51454bb46c454c48a16f8f82215000610eb1e319776cf10e086da147a8983c1b","sha256:aade6f230c279af7b998b7d3557c3e833f89d8b97d4c9f598ff8f6d0e2623e18"],"state_sha256":"d5187c391a08ab4d6bc3d21f7d7268aa6f2acaa3c888101fa58a6ea32d744f7f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OmD7aHqVisHk7cdGGw9OyPKarBPJG3y1WkYgE6WuqOKlJyTSUbHyXTXsRx5Yx1OM790cGXIOZnBcyZKMke/zAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T07:33:47.604854Z","bundle_sha256":"35435443a69a60fe7e7a5c0f957983f273d3fafda234ec241ce209ad983a5354"}}