22699
Oleanolic acid administered orally ( 1 , 5 and 10 mg / kg ) showed an antinociceptive effect in a dose - dependent manner as measured in the acetic acid - induced writhing test .
 Chemical: Oleanolic acid; Chemical: acetic acid
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: Oleanolic acid, acetic acid 
Answer:
 Chemical: Oleanolic acid; Chemical: acetic acid