23430
Cross - talk between constitutive androstane receptor and hypoxia - inducible factor in the regulation of gene expression .
 Chemical: androstane
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: androstane 
Answer:
 Chemical: androstane