{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:HX2MBHFRXENP6JLHNHU2AJ4W32","short_pith_number":"pith:HX2MBHFR","canonical_record":{"source":{"id":"1907.04198","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.RO","submitted_at":"2019-07-09T14:41:50Z","cross_cats_sorted":["cs.CL","cs.HC","cs.LG"],"title_canon_sha256":"78cb2f8b53ec832863e6bd237a58eedbf66585124566e88ea20440f0b6eec838","abstract_canon_sha256":"3502ef9cf4700e089ab4c5b61cbcff21ae077b4f62fa00832bee6e1c43e6d604"},"schema_version":"1.0"},"canonical_sha256":"3df4c09cb1b91aff256769e9a02796deabef961c5cfe1a0d862948d3e16041aa","source":{"kind":"arxiv","id":"1907.04198","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04198","created_at":"2026-05-17T23:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04198v1","created_at":"2026-05-17T23:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04198","created_at":"2026-05-17T23:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"HX2MBHFRXENP","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HX2MBHFRXENP6JLH","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HX2MBHFR","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:HX2MBHFRXENP6JLHNHU2AJ4W32","target":"record","payload":{"canonical_record":{"source":{"id":"1907.04198","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.RO","submitted_at":"2019-07-09T14:41:50Z","cross_cats_sorted":["cs.CL","cs.HC","cs.LG"],"title_canon_sha256":"78cb2f8b53ec832863e6bd237a58eedbf66585124566e88ea20440f0b6eec838","abstract_canon_sha256":"3502ef9cf4700e089ab4c5b61cbcff21ae077b4f62fa00832bee6e1c43e6d604"},"schema_version":"1.0"},"canonical_sha256":"3df4c09cb1b91aff256769e9a02796deabef961c5cfe1a0d862948d3e16041aa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:03.034137Z","signature_b64":"IbOlDnOq0g4kQsiByBKADQElOYPV5AhlrBSBxymnTOWr4AR1yuoJ0RxM+I4tHcGzPQkn1mCATAF5cMtb1t+IAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3df4c09cb1b91aff256769e9a02796deabef961c5cfe1a0d862948d3e16041aa","last_reissued_at":"2026-05-17T23:41:03.033502Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:03.033502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.04198","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":"2026-05-17T23:41:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4HV/Ub8/jQ67uqXKMXg068o2ai/yTj6aufBdKPiYInHz7DqU2ZmpCYvnCeSC2vjhyNd/1xeEK9bKOk+NbB62AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:39:17.290347Z"},"content_sha256":"d768235ab65d0ce4f95a5ea38ae1b500974d3fdff5918c0d895121a89e3abce0","schema_version":"1.0","event_id":"sha256:d768235ab65d0ce4f95a5ea38ae1b500974d3fdff5918c0d895121a89e3abce0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:HX2MBHFRXENP6JLHNHU2AJ4W32","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sequence-to-Sequence Natural Language to Humanoid Robot Sign Language","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.CL","cs.HC","cs.LG"],"primary_cat":"cs.RO","authors_text":"Bartek {\\L}ukawski, Carlos Balaguer, Jennifer J. Gago, Juan G. Victores, Ugo Pattacini, Vadim Tikhanoff, Valentina Vasco","submitted_at":"2019-07-09T14:41:50Z","abstract_excerpt":"This paper presents a study on natural language to sign language translation with human-robot interaction application purposes. By means of the presented methodology, the humanoid robot TEO is expected to represent Spanish sign language automatically by converting text into movements, thanks to the performance of neural networks. Natural language to sign language translation presents several challenges to developers, such as the discordance between the length of input and output data and the use of non-manual markers. Therefore, neural networks and, consequently, sequence-to-sequence models, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04198","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":"2026-05-17T23:41:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WWeixW0Tv0svoNnLaoB1r52BiMkkmn3Has2mOVLwj83C8uXdSMywCWLkkxIOb+MQ9kj1WfkG74+grVFqGAn8DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:39:17.291017Z"},"content_sha256":"99c03ddd6c4de7d532d8c28bf1675e0ac2add248a4a104601efafa742c3c8a89","schema_version":"1.0","event_id":"sha256:99c03ddd6c4de7d532d8c28bf1675e0ac2add248a4a104601efafa742c3c8a89"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HX2MBHFRXENP6JLHNHU2AJ4W32/bundle.json","state_url":"https://pith.science/pith/HX2MBHFRXENP6JLHNHU2AJ4W32/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HX2MBHFRXENP6JLHNHU2AJ4W32/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":"2026-05-25T19:39:17Z","links":{"resolver":"https://pith.science/pith/HX2MBHFRXENP6JLHNHU2AJ4W32","bundle":"https://pith.science/pith/HX2MBHFRXENP6JLHNHU2AJ4W32/bundle.json","state":"https://pith.science/pith/HX2MBHFRXENP6JLHNHU2AJ4W32/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HX2MBHFRXENP6JLHNHU2AJ4W32/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:HX2MBHFRXENP6JLHNHU2AJ4W32","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":"3502ef9cf4700e089ab4c5b61cbcff21ae077b4f62fa00832bee6e1c43e6d604","cross_cats_sorted":["cs.CL","cs.HC","cs.LG"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.RO","submitted_at":"2019-07-09T14:41:50Z","title_canon_sha256":"78cb2f8b53ec832863e6bd237a58eedbf66585124566e88ea20440f0b6eec838"},"schema_version":"1.0","source":{"id":"1907.04198","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.04198","created_at":"2026-05-17T23:41:03Z"},{"alias_kind":"arxiv_version","alias_value":"1907.04198v1","created_at":"2026-05-17T23:41:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.04198","created_at":"2026-05-17T23:41:03Z"},{"alias_kind":"pith_short_12","alias_value":"HX2MBHFRXENP","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HX2MBHFRXENP6JLH","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HX2MBHFR","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:99c03ddd6c4de7d532d8c28bf1675e0ac2add248a4a104601efafa742c3c8a89","target":"graph","created_at":"2026-05-17T23:41:03Z","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":"This paper presents a study on natural language to sign language translation with human-robot interaction application purposes. By means of the presented methodology, the humanoid robot TEO is expected to represent Spanish sign language automatically by converting text into movements, thanks to the performance of neural networks. Natural language to sign language translation presents several challenges to developers, such as the discordance between the length of input and output data and the use of non-manual markers. Therefore, neural networks and, consequently, sequence-to-sequence models, a","authors_text":"Bartek {\\L}ukawski, Carlos Balaguer, Jennifer J. Gago, Juan G. Victores, Ugo Pattacini, Vadim Tikhanoff, Valentina Vasco","cross_cats":["cs.CL","cs.HC","cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.RO","submitted_at":"2019-07-09T14:41:50Z","title":"Sequence-to-Sequence Natural Language to Humanoid Robot Sign Language"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.04198","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:d768235ab65d0ce4f95a5ea38ae1b500974d3fdff5918c0d895121a89e3abce0","target":"record","created_at":"2026-05-17T23:41:03Z","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":"3502ef9cf4700e089ab4c5b61cbcff21ae077b4f62fa00832bee6e1c43e6d604","cross_cats_sorted":["cs.CL","cs.HC","cs.LG"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.RO","submitted_at":"2019-07-09T14:41:50Z","title_canon_sha256":"78cb2f8b53ec832863e6bd237a58eedbf66585124566e88ea20440f0b6eec838"},"schema_version":"1.0","source":{"id":"1907.04198","kind":"arxiv","version":1}},"canonical_sha256":"3df4c09cb1b91aff256769e9a02796deabef961c5cfe1a0d862948d3e16041aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3df4c09cb1b91aff256769e9a02796deabef961c5cfe1a0d862948d3e16041aa","first_computed_at":"2026-05-17T23:41:03.033502Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:03.033502Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IbOlDnOq0g4kQsiByBKADQElOYPV5AhlrBSBxymnTOWr4AR1yuoJ0RxM+I4tHcGzPQkn1mCATAF5cMtb1t+IAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:03.034137Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.04198","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d768235ab65d0ce4f95a5ea38ae1b500974d3fdff5918c0d895121a89e3abce0","sha256:99c03ddd6c4de7d532d8c28bf1675e0ac2add248a4a104601efafa742c3c8a89"],"state_sha256":"fe44934b9fc7455d367c9a09fd51ae8bf892f015f10bc98c37a6c8a9f212355f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tk+2vw7EWInM3qT5/tCN7go5K/oXHeqagroorco+R9/9tKdc5pXpTeomnMMKItmQhLHD+1NnSmr+5/grVBHZAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:39:17.295196Z","bundle_sha256":"c6389038b299ce99df3db7ff70d54709662753ab8e7a7af883f98911ae975e63"}}