2399
PRO treatment suppressed the amount of tooth movement by 12 . 9 % in 3 - day ETM and by 32 . 2 % in 5 - day ETM compared with vehicle treatment .
 Chemical: PRO
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: PRO 
Answer:
 Chemical: PRO