mentions → clusters → entities
document
Tim Cook walked onto the stage.
He announced the new iPhone.
The company also showed a laptop.
It will ship in June.
Mary Chen leads the AI team.
She built the voice assistant.
three entities, seven mentions across three sentences
coreference clustering
Entity #1
Tim Cook
He
type: PERSON
Entity #2
The company
It
type: ORG
Entity #3
Mary Chen
She
type: PERSON
resolved clusters feed IE, QA, summarization — downstream tasks see one entity, not many mentions