3097
Concentrations of Pb , Cd , and other metals in tissues of 17 free - range and 32 commercial broiler chickens from the Kabwe mining town in Zambia were determined .
 Chemical: Pb; Chemical: Cd
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