20962
Metal concentrations ( Ag , As , Cd , Cu , Hg , Ni , Pb , and Zn ) were also concurrently determined in these species .
 Chemical: Ag; Chemical: As; Chemical: Cd; Chemical: Cu; Chemical: Hg; Chemical: Ni; Chemical: Pb; Chemical: Zn
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: Ag; Chemical: As; Chemical: Cd; Chemical: Cu; Chemical: Hg; Chemical: Ni; Chemical: Pb; Chemical: Zn