4388
In the antinociceptive and antiamnesic dose range , ( + / - ) - PG - 9 did not impair mouse performance evaluated by the rota - rod test and Animex apparatus .
 Chemical: PG - 9
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: PG - 9 
Answer:
 Chemical: PG - 9