{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:JRH56SZWXLCAFNALKNJTVIE5XO","short_pith_number":"pith:JRH56SZW","canonical_record":{"source":{"id":"1612.07630","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CY","submitted_at":"2016-12-22T15:00:16Z","cross_cats_sorted":["cs.SI"],"title_canon_sha256":"3c9ebb64cad5ce16a7db63a8d146db40081e41764e672cbceb4b062d4fa632fc","abstract_canon_sha256":"bb5529bfcb20311eaf762c6d62328b17a0c7d1d4e941fa4e2e4d305c9c5eb952"},"schema_version":"1.0"},"canonical_sha256":"4c4fdf4b36bac402b40b53533aa09dbb854cd37c08eabba97ab9b66131318d65","source":{"kind":"arxiv","id":"1612.07630","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07630","created_at":"2026-05-18T00:53:47Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07630v2","created_at":"2026-05-18T00:53:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07630","created_at":"2026-05-18T00:53:47Z"},{"alias_kind":"pith_short_12","alias_value":"JRH56SZWXLCA","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JRH56SZWXLCAFNAL","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JRH56SZW","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:JRH56SZWXLCAFNALKNJTVIE5XO","target":"record","payload":{"canonical_record":{"source":{"id":"1612.07630","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CY","submitted_at":"2016-12-22T15:00:16Z","cross_cats_sorted":["cs.SI"],"title_canon_sha256":"3c9ebb64cad5ce16a7db63a8d146db40081e41764e672cbceb4b062d4fa632fc","abstract_canon_sha256":"bb5529bfcb20311eaf762c6d62328b17a0c7d1d4e941fa4e2e4d305c9c5eb952"},"schema_version":"1.0"},"canonical_sha256":"4c4fdf4b36bac402b40b53533aa09dbb854cd37c08eabba97ab9b66131318d65","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:47.361497Z","signature_b64":"TEJ2ra6omUIhQ0DVfTBrOC9fvAZNSfn5I+ePUV+1bguNl1km8mQ+zTn8UTeprSj3MhEd82ypoJIATyqxXNY6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4c4fdf4b36bac402b40b53533aa09dbb854cd37c08eabba97ab9b66131318d65","last_reissued_at":"2026-05-18T00:53:47.361036Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:47.361036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1612.07630","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":"2026-05-18T00:53:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cwSJKfY4HaAYHZd1YUb88UEQmhkD64UalHzIpRyN8Y2bBslHjAmgwpswk4fL1vd0yKNwqUpnW4ptWKNo/MEUDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:46:01.118287Z"},"content_sha256":"31233eddfe2ec4bd215aa9d459651b5d32ee4941d9c213d791c06d33f32f586c","schema_version":"1.0","event_id":"sha256:31233eddfe2ec4bd215aa9d459651b5d32ee4941d9c213d791c06d33f32f586c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:JRH56SZWXLCAFNALKNJTVIE5XO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"\"420 Friendly\": Revealing Marijuana Use via Craigslist Rental Ads","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["cs.SI"],"primary_cat":"cs.CY","authors_text":"Anh Nguyen, Dong Nguyen, Long Nguyen, Tuan Tran, Uyen Le","submitted_at":"2016-12-22T15:00:16Z","abstract_excerpt":"Recent studies have shown that information mined from Craigslist can be used for informing public health policy or monitoring risk behavior. This paper presents a text-mining method for conducting public health surveillance of marijuana use concerns in the U.S. using online classified ads in Craigslist. We collected more than 200 thousands of rental ads in the housing categories in Craigslist and devised text-mining methods for efficiently and accurately extract rental ads associated with concerns about the uses of marijuana in different states across the U.S. We linked the extracted ads to th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07630","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":""},"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":"2026-05-18T00:53:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NwWdwBpWAQ+mziVj64RVXJQ9rKcHRASnYhzTtfs3DWQGOMOMifTI8XlIDxtpRuc3ygJZzQfy32RNfIQFeWN9DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:46:01.119044Z"},"content_sha256":"2cc22efd66f4eeb9d494c15d1154ce797554996a6fc74ad38a16acec8b0012bb","schema_version":"1.0","event_id":"sha256:2cc22efd66f4eeb9d494c15d1154ce797554996a6fc74ad38a16acec8b0012bb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JRH56SZWXLCAFNALKNJTVIE5XO/bundle.json","state_url":"https://pith.science/pith/JRH56SZWXLCAFNALKNJTVIE5XO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JRH56SZWXLCAFNALKNJTVIE5XO/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":"2026-05-30T22:46:01Z","links":{"resolver":"https://pith.science/pith/JRH56SZWXLCAFNALKNJTVIE5XO","bundle":"https://pith.science/pith/JRH56SZWXLCAFNALKNJTVIE5XO/bundle.json","state":"https://pith.science/pith/JRH56SZWXLCAFNALKNJTVIE5XO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JRH56SZWXLCAFNALKNJTVIE5XO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JRH56SZWXLCAFNALKNJTVIE5XO","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":"bb5529bfcb20311eaf762c6d62328b17a0c7d1d4e941fa4e2e4d305c9c5eb952","cross_cats_sorted":["cs.SI"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CY","submitted_at":"2016-12-22T15:00:16Z","title_canon_sha256":"3c9ebb64cad5ce16a7db63a8d146db40081e41764e672cbceb4b062d4fa632fc"},"schema_version":"1.0","source":{"id":"1612.07630","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07630","created_at":"2026-05-18T00:53:47Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07630v2","created_at":"2026-05-18T00:53:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07630","created_at":"2026-05-18T00:53:47Z"},{"alias_kind":"pith_short_12","alias_value":"JRH56SZWXLCA","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JRH56SZWXLCAFNAL","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JRH56SZW","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:2cc22efd66f4eeb9d494c15d1154ce797554996a6fc74ad38a16acec8b0012bb","target":"graph","created_at":"2026-05-18T00:53:47Z","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":"Recent studies have shown that information mined from Craigslist can be used for informing public health policy or monitoring risk behavior. This paper presents a text-mining method for conducting public health surveillance of marijuana use concerns in the U.S. using online classified ads in Craigslist. We collected more than 200 thousands of rental ads in the housing categories in Craigslist and devised text-mining methods for efficiently and accurately extract rental ads associated with concerns about the uses of marijuana in different states across the U.S. We linked the extracted ads to th","authors_text":"Anh Nguyen, Dong Nguyen, Long Nguyen, Tuan Tran, Uyen Le","cross_cats":["cs.SI"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CY","submitted_at":"2016-12-22T15:00:16Z","title":"\"420 Friendly\": Revealing Marijuana Use via Craigslist Rental Ads"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07630","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":"sha256:31233eddfe2ec4bd215aa9d459651b5d32ee4941d9c213d791c06d33f32f586c","target":"record","created_at":"2026-05-18T00:53:47Z","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":"bb5529bfcb20311eaf762c6d62328b17a0c7d1d4e941fa4e2e4d305c9c5eb952","cross_cats_sorted":["cs.SI"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CY","submitted_at":"2016-12-22T15:00:16Z","title_canon_sha256":"3c9ebb64cad5ce16a7db63a8d146db40081e41764e672cbceb4b062d4fa632fc"},"schema_version":"1.0","source":{"id":"1612.07630","kind":"arxiv","version":2}},"canonical_sha256":"4c4fdf4b36bac402b40b53533aa09dbb854cd37c08eabba97ab9b66131318d65","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4c4fdf4b36bac402b40b53533aa09dbb854cd37c08eabba97ab9b66131318d65","first_computed_at":"2026-05-18T00:53:47.361036Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:53:47.361036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TEJ2ra6omUIhQ0DVfTBrOC9fvAZNSfn5I+ePUV+1bguNl1km8mQ+zTn8UTeprSj3MhEd82ypoJIATyqxXNY6BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:53:47.361497Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.07630","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31233eddfe2ec4bd215aa9d459651b5d32ee4941d9c213d791c06d33f32f586c","sha256:2cc22efd66f4eeb9d494c15d1154ce797554996a6fc74ad38a16acec8b0012bb"],"state_sha256":"06b7f52fa3b20dec215d50f260c55f4f26dfa075e0b27aa7354a56b092ae2e7e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"79tiytAA2reT/xbQEcbGU++OImcrsPOwKtmViB0peABuz6erkBzmJu2bVY9BOIX232qdSQI6Rp0IfjtMYPw/CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:46:01.123997Z","bundle_sha256":"2b27874500c84f73c2f6b2b9031b8e3d3934f7faba8ac348971eef4c5bcb5f9b"}}