1761
The objective of this study was to investigate the impact of mercuric ( Hg ( 2 + ) ) and lead ( Pb ( 2 + ) ) ions on T cells .
 Chemical: mercuric; Chemical: Hg ( 2 + ); Chemical: Pb ( 2 + )
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: mercuric; Chemical: Hg ( 2 + ); Chemical: Pb ( 2 + )