15916
At pnd70 , the serum IgG , serum antibrain Abs , amounts of brain IgG , and brain cytokine levels of all of the Hg - treated offspring were equivalent to those of their appropriate controls , suggesting that developmental Hg exposure did not induce chronic immunological effects .
 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 
Answer:
 Chemical: Hg; Chemical: Hg