16865
The aim of this study was to evaluate the effect of tocopherol on pleuritis - induced rats exposed to 2 , 3 , 7 , 8 - tetrachlorodibenzo - p - dioxin ( TCDD ) .
 Chemical: tocopherol; Chemical: 2 , 3 , 7 , 8 - tetrachlorodibenzo - p - dioxin; 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: tocopherol; Chemical: 2 , 3 , 7 , 8 - tetrachlorodibenzo - p - dioxin; Chemical: TCDD