passages.id: 1.0alpha7.train.683.sent
passages.type: sentence
passages.text:     Lipoprotein retention in  atherosclerosis-prone regions is thought to be caused by the binding of  LDLs to proteoglycans ( PGs) of the extracellular matrix, which prevents their egress after crossing the endothelial barrier.  
coreferences.id: 1.0alpha7.train.683.coref0
coreferences.entity_ids: 1.0alpha7.train.683.ent0_0
coreferences.id: 1.0alpha7.train.683.coref1
coreferences.entity_ids: 1.0alpha7.train.683.ent1_0 1.0alpha7.train.683.ent2_0