| --- |
| features: |
| - name: input |
| dtype: string |
| - name: output |
| dtype: json |
| - name: schema |
| list: |
| - name: label |
| dtype: string |
| - name: description |
| dtype: string |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: data/maven_train.jsonl |
| - split: validation |
| path: data/maven_validation.jsonl |
| --- |
| |
| # MAVEN (mneb/casie format) |
|
|
| MAVEN (Wang et al., EMNLP 2020) converted into the mneb `json_structures` event-extraction |
| format. MAVEN is a massive general-domain event **detection** dataset — 168 event types over |
| English Wikipedia documents. It is ED-only (no argument annotation), so each record's `output` |
| carries only `json_structures`; every event's `arguments` is always `[]`. One record = one |
| sentence. ALL sentences are kept, including event-less ones (`json_structures: {}`). Char |
| offsets are end-exclusive (`input[start:end] == text`). Event-type strings are kept verbatim |
| from the raw release. |
|
|
| ## Splits |
|
|
| Official MAVEN document split: |
|
|
| | Split | Docs | Sentences | Event mentions | |
| |---|---:|---:|---:| |
| | `train` | 2,913 | 32,431 | 77,993 | |
| | `validation` | 710 | 8,042 | 18,904 | |
|
|
| `validation` is MAVEN's raw `valid` split, renamed for naming consistency with the other |
| converted datasets. The official `test` split is **not included**: its annotations are withheld |
| for the CodaLab leaderboard, so it carries no gold event type or mention, only candidate |
| triggers. |
|
|
| ## What is dropped from the raw release |
|
|
| - The unlabeled `test` split. |
| - `negative_triggers` and other candidate lists (explicitly-labeled non-events). |
| - Event coreference: MAVEN groups multiple mentions under one event instance. The flat |
| per-sentence format used here cannot represent that grouping, so mentions become independent |
| trigger entries — mention counts are preserved exactly (nothing deduplicated or merged). |
| - Numeric `type_id`s, mention/event ids, and the raw per-sentence token lists. |
|
|
| ## Token -> char note |
|
|
| MAVEN's raw trigger spans are token indices into per-sentence token lists that are lossy |
| (lowercased, rare words replaced by the literal string `unk`, PTB escapes for brackets/quotes). |
| Triggers were re-anchored to the raw sentence text via greedy earliest-match case-insensitive |
| alignment, trying PTB-variant candidates alongside the raw token, plus a neighbor-window |
| fallback search for `unk`-substituted tokens. This recovered 100% of mentions: 0 drops, 0 |
| offset failures across both splits. The emitted trigger `text` is always the authoritative |
| sentence slice (`input[start:end]`); it differs from the raw `trigger_word` in 795 (train) + 200 |
| (validation) cases, all case-only. |
|
|
| ## Provenance & license |
|
|
| Source: THU-KEG/MAVEN-dataset (data distributed via Google Drive / Tsinghua Cloud), MIT |
| license. Document text is drawn from English Wikipedia (CC BY-SA). The event schema is derived |
| from FrameNet. Annotations are crowd-sourced. |
|
|
| See `maven_label_summary.md` for the full 168-type inventory and per-split counts, and |
| `maven_vis.html` for a sampled visualiser (stratified sample, ≤20 records/type per split + 10 |
| empty records per split). |
|
|
