PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 992981-0 1976 Comparison of the effect of parenteral with oral biguanide therapy on vitamin B12 and bile acid absorption. Biguanides 49-58 NADH:ubiquinone oxidoreductase subunit B3 Homo sapiens 78-81