4009
METHOD : All subjects received placebo on Day 1 and haloperidol 2 mg on Days 2 and 25 .
 Chemical: haloperidol
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: haloperidol 
Answer:
 Chemical: haloperidol