28322
We studied the effect of metal mixture ( MM ) , comprising of As , Cd and Pb , in developing female rat skeleton from gestation day - 5 until postnatal day - 60 ( P - 60 ) .
 Chemical: As; Chemical: Cd; Chemical: Pb
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: As, Cd, Pb 
Answer:
 Chemical: As; Chemical: Cd; Chemical: Pb