{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:UAY4YSRY5M5PRL626HHRDOTD5X","short_pith_number":"pith:UAY4YSRY","canonical_record":{"source":{"id":"1812.10757","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2018-12-27T16:17:30Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"d3a6e2d395522e73f27df660b37b4defe393a7e8a5c1b004856db530dcc8572f","abstract_canon_sha256":"6fcc0e46208e1d659c1f8be0abedd5fea98eef9e07e2a3b7a26a067f17c352c7"},"schema_version":"1.0"},"canonical_sha256":"a031cc4a38eb3af8afdaf1cf11ba63edf49191a84bb2b6c9cd3f953c91f45bde","source":{"kind":"arxiv","id":"1812.10757","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.10757","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"arxiv_version","alias_value":"1812.10757v1","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.10757","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"pith_short_12","alias_value":"UAY4YSRY5M5P","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UAY4YSRY5M5PRL62","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UAY4YSRY","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:UAY4YSRY5M5PRL626HHRDOTD5X","target":"record","payload":{"canonical_record":{"source":{"id":"1812.10757","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2018-12-27T16:17:30Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"d3a6e2d395522e73f27df660b37b4defe393a7e8a5c1b004856db530dcc8572f","abstract_canon_sha256":"6fcc0e46208e1d659c1f8be0abedd5fea98eef9e07e2a3b7a26a067f17c352c7"},"schema_version":"1.0"},"canonical_sha256":"a031cc4a38eb3af8afdaf1cf11ba63edf49191a84bb2b6c9cd3f953c91f45bde","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:20.073161Z","signature_b64":"TLHiQjFbCengyJA5f/dUp+TNXu2Q5cttsXtxLJKgydJ+HhvrHZd29qMvkuqjMAIsiTz1eow4lZEkYseK4TjOCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a031cc4a38eb3af8afdaf1cf11ba63edf49191a84bb2b6c9cd3f953c91f45bde","last_reissued_at":"2026-05-17T23:57:20.072462Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:20.072462Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.10757","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":"2026-05-17T23:57:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"js+pELuiDYDpTK0Tbl0chDceGod2cAy0F9YrhzVTNNA/axHhCjRVEvwUoqNp/IvYGYxear3LEqblHUgDVU63AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:42:10.690422Z"},"content_sha256":"fe1c6142bf420dfeaf789a9f3a8be6d8de770c93f62dd9c58efa6d161492f062","schema_version":"1.0","event_id":"sha256:fe1c6142bf420dfeaf789a9f3a8be6d8de770c93f62dd9c58efa6d161492f062"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:UAY4YSRY5M5PRL626HHRDOTD5X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Advancing the State of the Art in Open Domain Dialog Systems through the Alexa Prize","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.CL","authors_text":"Anna Gottardi, Anu Venkatesh, Arindam Mandal, Behnam Hedayatnia, Chandra Khatri, Dilek Hakkani-Tur, Eric King, Gene Hwang, Han Song, Jeff Nunn, Karthik Gopalakrishnan, Kate Bland, Lauren Stubel, Ming Cheng, Nate Michel, Qinglang Chen, Qing Liu, Raefer Gabriel, Rohit Prasad, Sanjeev Kwatra, Sanju Pancholi, Yi Pan","submitted_at":"2018-12-27T16:17:30Z","abstract_excerpt":"Building open domain conversational systems that allow users to have engaging conversations on topics of their choice is a challenging task. Alexa Prize was launched in 2016 to tackle the problem of achieving natural, sustained, coherent and engaging open-domain dialogs. In the second iteration of the competition in 2018, university teams advanced the state of the art by using context in dialog models, leveraging knowledge graphs for language understanding, handling complex utterances, building statistical and hierarchical dialog managers, and leveraging model-driven signals from user response"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.10757","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":"2026-05-17T23:57:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E38pyuNu+RcCH/ALhTnxwbxoY2g1OJjmAxcfuN3HveW0RBS3kQY9MVIVudg0K9txojAYga7O8Zi/+zBAyxMrBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T02:42:10.690835Z"},"content_sha256":"196c2c3160adf945af3ec0b29f1d44d33fa9d30679b03b20c7da990bbbca3f71","schema_version":"1.0","event_id":"sha256:196c2c3160adf945af3ec0b29f1d44d33fa9d30679b03b20c7da990bbbca3f71"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UAY4YSRY5M5PRL626HHRDOTD5X/bundle.json","state_url":"https://pith.science/pith/UAY4YSRY5M5PRL626HHRDOTD5X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UAY4YSRY5M5PRL626HHRDOTD5X/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":"2026-05-27T02:42:10Z","links":{"resolver":"https://pith.science/pith/UAY4YSRY5M5PRL626HHRDOTD5X","bundle":"https://pith.science/pith/UAY4YSRY5M5PRL626HHRDOTD5X/bundle.json","state":"https://pith.science/pith/UAY4YSRY5M5PRL626HHRDOTD5X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UAY4YSRY5M5PRL626HHRDOTD5X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UAY4YSRY5M5PRL626HHRDOTD5X","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":"6fcc0e46208e1d659c1f8be0abedd5fea98eef9e07e2a3b7a26a067f17c352c7","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2018-12-27T16:17:30Z","title_canon_sha256":"d3a6e2d395522e73f27df660b37b4defe393a7e8a5c1b004856db530dcc8572f"},"schema_version":"1.0","source":{"id":"1812.10757","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.10757","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"arxiv_version","alias_value":"1812.10757v1","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.10757","created_at":"2026-05-17T23:57:20Z"},{"alias_kind":"pith_short_12","alias_value":"UAY4YSRY5M5P","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UAY4YSRY5M5PRL62","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UAY4YSRY","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:196c2c3160adf945af3ec0b29f1d44d33fa9d30679b03b20c7da990bbbca3f71","target":"graph","created_at":"2026-05-17T23:57:20Z","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":"Building open domain conversational systems that allow users to have engaging conversations on topics of their choice is a challenging task. Alexa Prize was launched in 2016 to tackle the problem of achieving natural, sustained, coherent and engaging open-domain dialogs. In the second iteration of the competition in 2018, university teams advanced the state of the art by using context in dialog models, leveraging knowledge graphs for language understanding, handling complex utterances, building statistical and hierarchical dialog managers, and leveraging model-driven signals from user response","authors_text":"Anna Gottardi, Anu Venkatesh, Arindam Mandal, Behnam Hedayatnia, Chandra Khatri, Dilek Hakkani-Tur, Eric King, Gene Hwang, Han Song, Jeff Nunn, Karthik Gopalakrishnan, Kate Bland, Lauren Stubel, Ming Cheng, Nate Michel, Qinglang Chen, Qing Liu, Raefer Gabriel, Rohit Prasad, Sanjeev Kwatra, Sanju Pancholi, Yi Pan","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2018-12-27T16:17:30Z","title":"Advancing the State of the Art in Open Domain Dialog Systems through the Alexa Prize"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.10757","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:fe1c6142bf420dfeaf789a9f3a8be6d8de770c93f62dd9c58efa6d161492f062","target":"record","created_at":"2026-05-17T23:57:20Z","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":"6fcc0e46208e1d659c1f8be0abedd5fea98eef9e07e2a3b7a26a067f17c352c7","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2018-12-27T16:17:30Z","title_canon_sha256":"d3a6e2d395522e73f27df660b37b4defe393a7e8a5c1b004856db530dcc8572f"},"schema_version":"1.0","source":{"id":"1812.10757","kind":"arxiv","version":1}},"canonical_sha256":"a031cc4a38eb3af8afdaf1cf11ba63edf49191a84bb2b6c9cd3f953c91f45bde","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a031cc4a38eb3af8afdaf1cf11ba63edf49191a84bb2b6c9cd3f953c91f45bde","first_computed_at":"2026-05-17T23:57:20.072462Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:20.072462Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TLHiQjFbCengyJA5f/dUp+TNXu2Q5cttsXtxLJKgydJ+HhvrHZd29qMvkuqjMAIsiTz1eow4lZEkYseK4TjOCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:20.073161Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.10757","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fe1c6142bf420dfeaf789a9f3a8be6d8de770c93f62dd9c58efa6d161492f062","sha256:196c2c3160adf945af3ec0b29f1d44d33fa9d30679b03b20c7da990bbbca3f71"],"state_sha256":"48f02414169a5ad398d4aa3df3a852b68f36d528b0cd9f77f1b954d1ded7134a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8DiWMbeDypAqhk824sheVxdYbdvx3znK33V+XDOGPG6MqUzYah6jmBDfKrRjjO3vF3W/t0TW3cRWYMgHtxgNDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T02:42:10.693466Z","bundle_sha256":"b75b0bc5c0795e86c5a0cbc920e3890eeeba670affe0a8809f0f9cf2d2ec47af"}}