passages.id: 1.0alpha7.train.851.sent
passages.type: sentence
passages.text: It has been proposed that  Rb binds to the  E2F activation domain and blocks its function as a  transcription factor.
coreferences.id: 1.0alpha7.train.851.coref0
coreferences.entity_ids: 1.0alpha7.train.851.ent0_0
coreferences.id: 1.0alpha7.train.851.coref1
coreferences.entity_ids: 1.0alpha7.train.851.ent1_0
coreferences.id: 1.0alpha7.train.851.coref2
coreferences.entity_ids: 1.0alpha7.train.851.ent2_0