3456
Structural and functional measurements indicate that androgens exert a permissive or necessary action on the structural configuration of the oropharynx that predisposes to obstruction during sleep .
 Chemical: androgens
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: androgens