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2 , 3 , 7 , 8 - Tetrachlorodibenzo - p - dioxin ( TCDD ) is the unintentional byproduct of various industrial processes , is classified as human carcinogen and could disrupt reproductive , developmental and endocrine systems .
 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: 2 , 3 , 7 , 8 - Tetrachlorodibenzo - p - dioxin; Chemical: TCDD