passages.id: 1.0alpha7.train.211.sent
passages.type: sentence
passages.text: Therefore, we hypothesized that co-stimulatory molecules that preferentially bind CD28 or CTLA-4 would have dramatically altered biological properties.
coreferences.id: 1.0alpha7.train.211.coref0
coreferences.entity_ids: 1.0alpha7.train.211.ent0_0
coreferences.id: 1.0alpha7.train.211.coref1
coreferences.entity_ids: 1.0alpha7.train.211.ent1_0