6914
Fatty acid amide hydrolase ( FAAH ) plays a key role in regulating the tone of the endocannabinoid system .
 Chemical: Fatty acid; Chemical: amide
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: Fatty acid; Chemical: amide