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In the present study , we found that the rats of PTU + Vit E group spent less time to find the platform on days 2 , 3 , 4 , and 5 than the PTU group .
 Chemical: PTU; Chemical: Vit E; Chemical: PTU
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: PTU, Vit E, PTU 
Answer:
 Chemical: PTU; Chemical: Vit E; Chemical: PTU