passages.id: 1.0alpha7.train.424.sent
passages.type: sentence
passages.text:  Regulation of 3' splice site choice, both positive and negative, can be realized by influencing the  pyrimidine tract binding of  U2AF (Tian and Maniatis 1993  ; Valcarcel et al. 1993  ; Reed 1996  ).  
coreferences.id: 1.0alpha7.train.424.coref0
coreferences.entity_ids: 1.0alpha7.train.424.ent0_0
coreferences.id: 1.0alpha7.train.424.coref1
coreferences.entity_ids: 1.0alpha7.train.424.ent1_0