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Before ratios can be used in risk management , more information is needed on mercury : selenium interactions and mutual bioavailability , and on the relationship between molar ratios and health outcomes .
 Chemical: mercury; Chemical: selenium
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: mercury; Chemical: selenium