29007
2 , 3 , 7 , 8 - TCDD induces neurotoxicity and neuronal apoptosis in the rat brain cortex and PC12 cell line through the down - regulation of the Wnt / beta - catenin signaling pathway .
 Chemical: 2 , 3 , 7 , 8 - 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 - TCDD