23874
beta - Ionone is an end ring analog of beta - carotenoid which has been shown to possess potent anti - proliferative activity both in vitro and in vivo .
 Chemical: beta - Ionone
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: beta - Ionone 
Answer:
 Chemical: beta - Ionone