10466
The goal of the present study was to evaluate zebra mussels for use as a biomonitor of mercury contamination by comparing zebra mussel mercury concentrations between a lake with only indirect atmospheric mercury contamination ( Otisco Lake , NY , USA ) and a lake that was directly contaminated by mercury discharges ( Onondaga Lake , NY , USA ) .
 Chemical: mercury; Chemical: mercury; 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: mercury; Chemical: mercury; Chemical: mercury; Chemical: mercury