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Aflatoxin M1 ( AF M1 ) , a hydroxylated metabolite of AF B1 , is an important toxin that can contaminate the milk of lactating mothers .
 Chemical: Aflatoxin M1; Chemical: AF M1; Chemical: AF B1
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: Aflatoxin M1; Chemical: AF M1; Chemical: AF B1