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Moreover , the rats of PTU + L - T4 + Vit E group spent less time to find the platform on days 4 and 5 than the PTU + L - T4 group .
 Chemical: PTU; Chemical: L - T4; Chemical: Vit E; Chemical: PTU; Chemical: L - T4
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, L - T4, Vit E, PTU, L - T4 
Answer:
 Chemical: PTU; Chemical: L - T4; Chemical: Vit E; Chemical: PTU; Chemical: L - T4