18710
Thus , the TCDD - induced reduction in canonical Wnt signaling is associated with a decrease in activators ( Rspo2 and Rspo3 ) rather than an increase in inhibitors ( Dkk1 and Dkk2 ) of the pathway .
 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