Ultra-Fine Entity Typing

Understand

We introduce a new entity typing task: given a sentence with an entity mention, the goal is to predict a set of free-form phrases (e.g.

• skyscraper, songwriter, or criminal) that describe appropriate types for the target entity.
• This formulation allows us to use a new type of distant supervision at large scale: head words, which indicate the type of the noun phrases they appear in.
• We show that these ultra-fine types can be crowd-sourced, and introduce new evaluation sets that are much more diverse and fine-grained than existing benchmarks.