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Upgradient samples , unexposed to acetate , showed low levels of arsenic ( =~ 1 mu M ) , with greater than 90 % as arsenate ( As [ V ] ) and a small amount of arsenite ( As [ III ] ) .
 Chemical: acetate; Chemical: arsenic; Chemical: arsenate; Chemical: As [ V ]; Chemical: arsenite; Chemical: As [ III ]
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: acetate; Chemical: arsenic; Chemical: arsenate; Chemical: As [ V ]; Chemical: arsenite; Chemical: As [ III ]