3098
Mean concentrations of Pb and Cd exceeded maximum levels for human consumption in some organs including muscle ( Pb only ) in free - range chickens , in contrast to low levels in broiler chickens .
 Chemical: Pb; Chemical: Cd; Chemical: Pb
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: Pb