1591
In conclusion , this study supports epidemiological studies that associate exposure to pesticides with increased risk of AD , and we identified the specific pesticides beta - HCH , dieldrin and pp ' - DDE that are associated with the risk of AD in the north Indian population .
 Chemical: beta - HCH; Chemical: dieldrin; Chemical: pp ' - DDE
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: beta - HCH; Chemical: dieldrin; Chemical: pp ' - DDE