Pith Number

pith:PIWZFZCR

pith:2021:PIWZFZCRHEZYQLJ2NXT6UGPUDY

not attested not anchored not stored refs pending

MCR-Net: A Multi-Step Co-Interactive Relation Network for Unanswerable Questions on Machine Reading Comprehension

Jing Yu, Luxi Xing, Wei Peng, Yajing Sun, Yue Hu, Yuqiang Xie, Zihao Zhu

arxiv:2103.04567 v2 · 2021-03-08 · 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{PIWZFZCRHEZYQLJ2NXT6UGPUDY}

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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	2026-07-05T02:42:29.774363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a2d92e4513933882d3a6de7ea19f41e1de0597342f5cf1925cabb8ab75de690

Aliases

arxiv: 2103.04567 · arxiv_version: 2103.04567v2 · doi: 10.48550/arxiv.2103.04567 · pith_short_12: PIWZFZCRHEZY · pith_short_16: PIWZFZCRHEZYQLJ2 · pith_short_8: PIWZFZCR

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/PIWZFZCRHEZYQLJ2NXT6UGPUDY \
  | 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: 7a2d92e4513933882d3a6de7ea19f41e1de0597342f5cf1925cabb8ab75de690

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38601e799bd2944e13267dee8ca77e49b5abb5af6b91e1462e534a7d78b3e8af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-03-08T06:38:14Z",
    "title_canon_sha256": "f1a20bd8d44d4ee185ec510a4f94d9c48e8b0e9d4fd1948460f01dd0dccd5633"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.04567",
    "kind": "arxiv",
    "version": 2
  }
}