---
features:
  - name: input
    dtype: string
  - name: output
    dtype: json
  - name: schema
    list:
      - name: label
        dtype: string
      - name: description
        dtype: string
configs:
  - config_name: trigger_and_args
    default: true
    data_files:
      - split: test
        path: data/fewevent_trigger_and_args_test.jsonl
  - config_name: trigger_only
    data_files:
      - split: test
        path: data/fewevent_trigger_only_test.jsonl
---

# FewEvent (mneb/casie format)

FewEvent (Deng et al., WSDM 2020) converted into the mneb `json_structures` event-extraction
format. FewEvent annotates two tasks — event **detection** (triggers) and event **argument
extraction** (roles); it has no entity or relation layer, so each record's `output` carries
only `json_structures`. Char offsets are end-exclusive (`input[start:end] == text`).
One record = one sentence = one event. Single `test` split per config.

## The two configs (split by what annotation is present)

- **`trigger_and_args`** (default) — ~16.4k records that carry a clean trigger **and typed
  arguments** (33 event types, 35 roles). Supports both event detection and argument
  extraction.
- **`trigger_only`** — ~65k records with a trigger but **no arguments** (`arguments: []`).
  Supports event detection only.

The split criterion is the annotation itself (does the instance have clean role-typed
arguments?), i.e. which task it supports — **not** the raw data source. Provenance correlates
but does not line up cleanly:

- `trigger_and_args` is essentially the **human-annotated** portion (ACE-2005 + TAC-KBP-2017).
- `trigger_only` is **mostly** the Freebase/Wikipedia **distant-supervised** portion, but also
  includes a few thousand ACE/KBP-origin instances that simply lack clean argument
  annotations (the raw enriched file was augmented unevenly). So these are named by task, not
  by source.

## Provenance & license (please read before redistributing)

FewEvent was built from: **ACE-2005** (LDC2006T06) + **TAC-KBP-2017 Event Track** (both
human-annotated, **LDC-licensed / restricted**), and **Freebase + Wikipedia** auto-labeled
data (distant supervision; Wikipedia text is CC-BY-SA, Freebase was CC-BY). The upstream
GitHub release (`231sm/Low_Resource_KBP`) ships **no license file**. The `trigger_and_args`
half therefore contains LDC-derived text whose public redistribution may be restricted;
downstream users should ensure they hold the appropriate ACE-2005 / TAC-KBP licenses. The
`trigger_only` half's distant-supervised labels are **noisy** — treat as eval-only, and do
not treat absence of an event as ground truth.

See `fewevent_label_summary.md` for the full type/role inventory and counts, and
`fewevent_vis.html` for a sampled visualiser.