m2e2_label_summary.md

# M2E2 (text) — label summary

Counts computed from `processed_data/m2e2/test.jsonl` (6013 records, single `test` split;
source = `text_only_event.json`). Scope caveat: this is the `text_only` subset = **85% of
the paper's 1297 text events** (the 192 image-grounded events in `text_multimedia` are
excluded, matching TextEE). Use as **eval-only**; absence of an event is not ground truth.

## Event types — 8 (1105 event mentions)

| Event type | Count |
|---|---:|
| Conflict:Attack | 302 |
| Movement:Transport | 229 |
| Life:Die | 176 |
| Justice:Arrest-Jail | 121 |
| Contact:Meet | 104 |
| Conflict:Demonstrate | 98 |
| Contact:Phone-Write | 43 |
| Transaction:Transfer-Money | 32 |
| **Total** | **1105** |

## Entity types — 8 (21569 entity mentions)

| Entity type | Count |
|---|---:|
| geopolitical | 7307 |
| person | 7011 |
| organization | 4602 |
| location | 1321 |
| facility | 716 |
| vehicle | 300 |
| weapon | 279 |
| value | 33 |
| **Total** | **21569** |

## Argument roles — 15 (1659 argument instances)

| Role | Count |
|---|---:|
| Place | 384 |
| Entity | 190 |
| Attacker | 166 |
| Target | 152 |
| Artifact | 136 |
| Victim | 133 |
| Destination | 123 |
| Agent | 121 |
| Origin | 78 |
| Person | 72 |
| Instrument | 36 |
| Giver | 23 |
| Recipient | 21 |
| Vehicle | 21 |
| Police | 3 |
| **Total** | **1659** |

## Totals at a glance

| Item | Value |
|---|---:|
| Records (sentences) | 6013 |
| — with ≥1 event | 932 |
| — empty (no event) | 5081 |
| Event mentions | 1105 |
| Event types | 8 |
| Argument instances | 1659 |
| Argument roles | 15 |
| Entity mentions | 21569 |
| Entity types | 8 |

---

# Definitions

Source note: the M2E2 paper (Li et al., ACL 2020) does **not** restate definitions — it
adopts the **ACE 2005 annotation guidelines (Walker et al. 2006)** and selects the 8 event
types as the complete intersection of ACE and imSitu (the visually depictable subset). The
definitions below paraphrase ACE 2005; the **Roles** column lists the argument roles that
actually occur for that type **in this shipped `text_only` data** (the paper's Table 1
ontology allows a few more, e.g. `Instrument` on several types; `Participant` is the
ontology name for what the data labels `Entity` on Contact:Meet).

## Event types

| Event type | Definition (per ACE 2005, as adopted by M2E2) | Roles present in data |
|---|---|---|
| **Conflict:Attack** | A violent physical act intended to cause physical harm or damage to a target — any attack not covered by a more specific type (shootings, bombings, air strikes, etc.). | Attacker, Target, Place, Instrument |
| **Movement:Transport** | A person or artifact (vehicle/weapon) is moved from one place (origin) to another (destination). | Artifact, Destination, Origin, Agent, Vehicle |
| **Life:Die** | The life of a person ends — accidental, intentional, or self-inflicted. | Victim, Place, Agent, Instrument |
| **Justice:Arrest-Jail** | A person's freedom of movement is restricted by a state actor (police/government) — being arrested or held in custody/jail. | Person, Place, Agent |
| **Contact:Meet** | Two or more entities come together at a single location and interact **face-to-face** (talks, summits, visits). | Entity (= ontology "Participant"), Place |
| **Conflict:Demonstrate** | A large number of people gather in a public place to protest or demand official action (protests, rallies, strikes, riots). | Place, Entity, Police |
| **Contact:Phone-Write** | Two or more parties communicate **not** face-to-face — by telephone or written/electronic correspondence. | Entity, Place |
| **Transaction:Transfer-Money** | Giving, receiving, lending, or borrowing money, **not** as payment for goods/services. | Giver, Recipient |

## Entity types

| Entity type | Definition (per ACE 2005, as adopted by M2E2) | Examples in data |
|---|---|---|
| **person** (ACE: PER) | A human, whether a single individual or a group of people. | `Morsi`, `supporters`, `police forces` |
| **geopolitical** (ACE: GPE) | A composite entity of population + government + physical territory: a nation, state, province, county, or city. | `U.S.`, `Syrian`, `Baton Rouge` |
| **organization** (ACE: ORG) | A group of people defined by a formal organizational structure — corporations, agencies, institutions. | `police`, `Nation of Islam`, `IS` |
| **location** (ACE: LOC) | A geographical/natural place defined by physical features, **not** a geopolitical (GPE) — regions, land masses, bodies of water. | `West African region`, `Europe`, `Algerian desert` |
| **facility** (ACE: FAC) | A man-made permanent structure or real-estate improvement — buildings, airports, refineries, jails. | `mosque`, `hospital`, `jail` |
| **vehicle** (ACE: VEH) | A physical device designed to move/carry people or objects between locations. | `car`, `vessels`, `flight` |
| **weapon** (ACE: WEA) | A physical device primarily used as an instrument to harm or destroy. | `bullets`, `weapons` |
| **value** (ACE: VALUE) | An ACE non-entity quantity; in this data it is almost entirely monetary amounts and percentages. | `$210 million`, `51 percent stake`, `$1 billion` |