Pith Number

pith:QO3ZYRTB

pith:2019:QO3ZYRTBNU63ZRVWTWNM2ZCDFT

not attested not anchored not stored refs pending

Improving Chemical Named Entity Recognition in Patents with Contextualized Word Embeddings

Camilo Thorne, Christian Druckenbrodt, Dat Quoc Nguyen, Karin Verspoor, Michelle Gregory, Saber A. Akhondi, Trevor Cohn, Zenan Zhai

arxiv:1907.02679 v1 · 2019-07-05 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QO3ZYRTBNU63ZRVWTWNM2ZCDFT}

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	2026-05-17T23:41:23.513783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83b79c46616d3dbcc6b69d9acd64432ce6167ce424062a917d6496621427906d

Aliases

arxiv: 1907.02679 · arxiv_version: 1907.02679v1 · doi: 10.48550/arxiv.1907.02679 · pith_short_12: QO3ZYRTBNU63 · pith_short_16: QO3ZYRTBNU63ZRVW · pith_short_8: QO3ZYRTB

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/QO3ZYRTBNU63ZRVWTWNM2ZCDFT \
  | 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: 83b79c46616d3dbcc6b69d9acd64432ce6167ce424062a917d6496621427906d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c25820eb438f2b7e14f15e8e8dab8ed5ff6664995d0300d0cfd4bf542c8e230b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-07-05T05:19:46Z",
    "title_canon_sha256": "c4fd5288dc83bbfb65d068f419bbbdb9da491547cc324b5b275185776f1f9e7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.02679",
    "kind": "arxiv",
    "version": 1
  }
}