15883
In addition , Pb ( 2 + ) treatment induced beta - MHC and BNP whereas inhibited alpha - MHC mRNA and protein levels in vivo in a dose - dependent manner .
 Chemical: Pb ( 2 + )
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: Pb ( 2 + ) 
Answer:
 Chemical: Pb ( 2 + )