13945
It has been reported that Northern populations are exposed to mixtures of various environmental contaminants unique to the Arctic ( Northern contaminant mixtures - NCM ) at a large range of concentrations , depending on their geological location , age , lifestyle and dietary habits .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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