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These findings indicate that RA acted as a co - carcinogen in the BHA forestomach carcinogenesis of the rat .
 Chemical: RA; Chemical: BHA; Disease: forestomach carcinogenesis
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: RA; Chemical: BHA; Disease: forestomach carcinogenesis