7951
Inhibition by phenformin of oxygen consumption via complex I respiration in isolated rat liver mitochondria was greater than that in heart mitochondria , whereas inhibitory effect of phenformin on complex I respiration was similar in inside - out structured submitochondrial particles prepared from rat livers and hearts .
 Chemical: phenformin; Chemical: oxygen; Chemical: phenformin
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: phenformin, oxygen, phenformin 
Answer:
 Chemical: phenformin; Chemical: oxygen; Chemical: phenformin