5309
Using normal human epidermal keratinocytes , we investigated the mechanism of TCDD - mediated enhancement of epidermal differentiation by integrating functional genomic , metabolomic , and biochemical analyses .
 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