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Together , these data demonstrated that the mixture of As , Cd and Pb induced synergistic toxicity to developing skeleton thereby diminishing modeling - directed bone accrual , inducing osteopenia and dampening fracture healing .
 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