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There is an emerging consensus that people consuming large amounts of fish with selenium : mercury ratios below 1 are at higher risk from mercury toxicity .
 Chemical: selenium; Chemical: mercury; Chemical: mercury
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: selenium; Chemical: mercury; Chemical: mercury