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We conducted a large scale investigation of the bioaccessibility of 12 trace elements from 11 marine mollusc species ( scallop , oyster , clam , abalone , snail , and mussel ) collected from five locations in Chinese coastal waters .
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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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