21709
In soil samples , concentrations of analytes were found in the range of 4 . 0 +/- 0 . 2 - 12 , 000 +/- 60 mg / kg for Pb , 0 . 15 +/- 0 . 01 - 3 . 0 +/- 0 . 1 mg / kg for Cd and 21 +/- 1 - 65 +/- 3 . 4 mg / kg for Ni .
 Chemical: Pb; Chemical: Cd; Chemical: Ni
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: Pb; Chemical: Cd; Chemical: Ni