Pith Number

pith:B4LE2X3J

pith:2019:B4LE2X3J3EVXSTHAI42M6XNDN3

not attested not anchored not stored refs pending

HAS-QA: Hierarchical Answer Spans Model for Open-domain Question Answering

Jiafeng Guo, Jun Xu, Liang Pang, Lixin Su, Xueqi Cheng, Yanyan Lan

arxiv:1901.03866 v1 · 2019-01-12 · 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{B4LE2X3J3EVXSTHAI42M6XNDN3}

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	2026-05-17T23:56:26.856938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f164d5f69d92b794ce04734cf5da36ec019fd6d2b764a57320eed6ffd4eff0e

Aliases

arxiv: 1901.03866 · arxiv_version: 1901.03866v1 · doi: 10.48550/arxiv.1901.03866 · pith_short_12: B4LE2X3J3EVX · pith_short_16: B4LE2X3J3EVXSTHA · pith_short_8: B4LE2X3J

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/B4LE2X3J3EVXSTHAI42M6XNDN3 \
  | 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: 0f164d5f69d92b794ce04734cf5da36ec019fd6d2b764a57320eed6ffd4eff0e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc8553ef6cf498c7e4a456ef75b71aea7a3d2476d6724300c66242fec45ba5c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-01-12T14:29:35Z",
    "title_canon_sha256": "d056ec3987c70d73dde0628af53ab9a77d833c9bb09bd98d703f14834b5c7e35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03866",
    "kind": "arxiv",
    "version": 1
  }
}