Pith Number

pith:UO67YMGE

pith:2013:UO67YMGEBAJQOSVCEZ6CM72E5S

not attested not anchored not stored refs pending

Supervised Topical Key Phrase Extraction of News Stories using Crowdsourcing, Light Filtering and Co-reference Normalization

Anatole Gershman, Jaime Carbonell, Jo\~ao P. Neto, Luis Marujo, Robert Frederking

arxiv:1306.4886 v1 · 2013-06-20 · cs.CL · cs.IR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UO67YMGEBAJQOSVCEZ6CM72E5S}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:20:21.274936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3bdfc30c40813074aa2267c267f44ec8652e00052f7461cf23cedf73d504769

Aliases

arxiv: 1306.4886 · arxiv_version: 1306.4886v1 · doi: 10.48550/arxiv.1306.4886 · pith_short_12: UO67YMGEBAJQ · pith_short_16: UO67YMGEBAJQOSVC · pith_short_8: UO67YMGE

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UO67YMGEBAJQOSVCEZ6CM72E5S \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a3bdfc30c40813074aa2267c267f44ec8652e00052f7461cf23cedf73d504769

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4a0074fc6889835f9b7839d9c2f9dc2b183657bce32cb02ef294d3c7c4df3de",
    "cross_cats_sorted": [
      "cs.IR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2013-06-20T14:22:00Z",
    "title_canon_sha256": "9a976d0f2bbed083fe343a030224230cc51ca75f00a66b0a62b78351244952e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.4886",
    "kind": "arxiv",
    "version": 1
  }
}