Pith Number

pith:BJ3OXQ2Q

pith:2020:BJ3OXQ2QH543BDKCV2BOMYYUUP

not attested not anchored not stored refs pending

Event Extraction by Answering (Almost) Natural Questions

Claire Cardie, Xinya Du

arxiv:2004.13625 v2 · 2020-04-28 · 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{BJ3OXQ2QH543BDKCV2BOMYYUUP}

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.

Cited by

1 paper in Pith

EXCEEDS: Extracting Complex Events via Nugget-based Grid Modeling in Scientific Domain

Receipt and verification

First computed	2026-07-05T02:12:52.599626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a76ebc3503f79b08d42ae82e66314a3c27c968809ca53deacc5b99e08565b38

Aliases

arxiv: 2004.13625 · arxiv_version: 2004.13625v2 · doi: 10.48550/arxiv.2004.13625 · pith_short_12: BJ3OXQ2QH543 · pith_short_16: BJ3OXQ2QH543BDKC · pith_short_8: BJ3OXQ2Q

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/BJ3OXQ2QH543BDKCV2BOMYYUUP \
  | 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: 0a76ebc3503f79b08d42ae82e66314a3c27c968809ca53deacc5b99e08565b38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "789b5394455621f31bf19bd2a6b4768f9cba7fe0ca292b1e28f006d531d6efff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2020-04-28T16:15:46Z",
    "title_canon_sha256": "32b3d52db5a2ae6f11ecd9b469ecff19f5941fb9476fdee78378c0e0c464f52e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.13625",
    "kind": "arxiv",
    "version": 2
  }
}