4851
Loss of this layer during development may account for most if not all of the TCDD - induced cardiotoxicity in zebrafish .
 Chemical: TCDD
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: TCDD 
Answer:
 Chemical: TCDD