9420
Inhibition effects and induction of apoptosis of flavonoids on the prostate cancer cell line PC - 3 in vitro .
 Chemical: flavonoids
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: flavonoids 
Answer:
 Chemical: flavonoids