28324
MM , administered at their most frequently occurring concentrations present in the ground - water of India , i . e . As : 0 . 38ppm , Pb : 0 . 22 ppm and Cd : 0 . 098 ppm or 10 x of the ratio to developing rats exhibited a synergistic decrease in ex vivo mineralization of bone marrow stromal ( osteoprogenitor ) cells .
 Chemical: As; Chemical: Pb; Chemical: Cd
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, Pb, Cd 
Answer:
 Chemical: As; Chemical: Pb; Chemical: Cd