{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:AIJW25VEEQPPS4UQQPFYXWEX2W","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":"188116282e8e75f1f39300de6b3d5e4739111d0ceeb66dd649de3037b22ccdbd","cross_cats_sorted":["cs.AI","cs.CL","cs.RO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-03T16:39:05Z","title_canon_sha256":"f69e686b2d37e9b613ad7b8c40f855c15ba05c8d887bc32a39ff575f6b42a8a9"},"schema_version":"1.0","source":{"id":"1907.02022","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.02022","created_at":"2026-07-05T00:22:00Z"},{"alias_kind":"arxiv_version","alias_value":"1907.02022v2","created_at":"2026-07-05T00:22:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.02022","created_at":"2026-07-05T00:22:00Z"},{"alias_kind":"pith_short_12","alias_value":"AIJW25VEEQPP","created_at":"2026-07-05T00:22:00Z"},{"alias_kind":"pith_short_16","alias_value":"AIJW25VEEQPPS4UQ","created_at":"2026-07-05T00:22:00Z"},{"alias_kind":"pith_short_8","alias_value":"AIJW25VE","created_at":"2026-07-05T00:22:00Z"}],"graph_snapshots":[{"event_id":"sha256:8fa82c91cebe726909d5997b86feeac2c339e0c591f9536cfd9510ee3e96919f","target":"graph","created_at":"2026-07-05T00:22:00Z","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/1907.02022/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A visually-grounded navigation instruction can be interpreted as a sequence of expected observations and actions an agent following the correct trajectory would encounter and perform. Based on this intuition, we formulate the problem of finding the goal location in Vision-and-Language Navigation (VLN) within the framework of Bayesian state tracking - learning observation and motion models conditioned on these expectable events. Together with a mapper that constructs a semantic spatial map on-the-fly during navigation, we formulate an end-to-end differentiable Bayes filter and train it to ident","authors_text":"Ayush Shrivastava, Devi Parikh, Dhruv Batra, Peter Anderson, Stefan Lee","cross_cats":["cs.AI","cs.CL","cs.RO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-03T16:39:05Z","title":"Chasing Ghosts: Instruction Following as Bayesian State Tracking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.02022","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":"sha256:605a4ca67fabbbaa00e15e1e69160030fe6d53fa31db113b15b366cf03187144","target":"record","created_at":"2026-07-05T00:22:00Z","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":"188116282e8e75f1f39300de6b3d5e4739111d0ceeb66dd649de3037b22ccdbd","cross_cats_sorted":["cs.AI","cs.CL","cs.RO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-03T16:39:05Z","title_canon_sha256":"f69e686b2d37e9b613ad7b8c40f855c15ba05c8d887bc32a39ff575f6b42a8a9"},"schema_version":"1.0","source":{"id":"1907.02022","kind":"arxiv","version":2}},"canonical_sha256":"02136d76a4241ef9729083cb8bd897d5bb86471f79825834bb603b31ccef794f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02136d76a4241ef9729083cb8bd897d5bb86471f79825834bb603b31ccef794f","first_computed_at":"2026-07-05T00:22:00.191052Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:22:00.191052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G1lnfRPvZ9uWkAUfAOONwjzelzQklOC2XITRzzIXpmMul5TapOc6R8BByC7b+tySf0njI+GBBPLw9rcP7hPQAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:22:00.191616Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.02022","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:605a4ca67fabbbaa00e15e1e69160030fe6d53fa31db113b15b366cf03187144","sha256:8fa82c91cebe726909d5997b86feeac2c339e0c591f9536cfd9510ee3e96919f"],"state_sha256":"15d324c111d1f70fa88ce8b8904e64ac5e9f74c58664060649ff2923616c764c"}