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TCDD had no effect on AR activity in PC - 3 cells , whereas the shortest AR variant was induced by TCDD in PNT1A cells .
 Chemical: TCDD; Chemical: TCDD
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: TCDD; Chemical: TCDD