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To demonstrate the use of this technique for investigating potential endocrine disrupting effects , zebrafish embryos were exposed to 1 , 10 and 100nM 6 - OH - BDE - 47 .
 Chemical: 6 - OH - BDE - 47
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: 6 - OH - BDE - 47