9888
Nuclear receptor CAR specifically activates the two - pore K + channel Kcnk1 gene in male mouse livers , which attenuates phenobarbital - induced hepatic hyperplasia .
 Chemical: K +; Chemical: phenobarbital
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: K +; Chemical: phenobarbital