PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1390770-1 1992 The erythropoietin (EPO) molecule contains four carbohydrate chains. Carbohydrates 48-60 erythropoietin Homo sapiens 4-18 1390770-1 1992 The erythropoietin (EPO) molecule contains four carbohydrate chains. Carbohydrates 48-60 erythropoietin Homo sapiens 20-23