30449
Mice were treated with ten injections of either MPTP ( 20 mg / kg ; s . c . ; every 3 . 5 days ) or saline vehicle ( 10 ml / kg ; s . c . ; every 3 . 5 days ) .
 Chemical: MPTP
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: MPTP 
Answer:
 Chemical: MPTP