13495
If fish occupying low trophic levels are capable of surviving with high Hg body burdens , this tolerance has important implications for Hg exposure of organisms occupying higher trophic levels .
 Chemical: Hg; Chemical: Hg
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: Hg; Chemical: Hg