19728
Because higher Hg concentrations in the diets of primary consumers and predatory insects in lower pH waters led to lower BMFs , these feeding groups showed insignificant relationships between Hg and pH ; thus , altered BMFs associated with dietary concentrations can dampen the effects of environmental conditions on Hg concentrations .
 Chemical: Hg; Chemical: Hg; Chemical: Hg
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Hg, Hg, Hg 
Answer:
 Chemical: Hg; Chemical: Hg; Chemical: Hg