13135
Polyphosphates inhibit extracellular matrix mineralization in MC3T3 - E1 osteoblast cultures .
 Chemical: Polyphosphates
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: Polyphosphates 
Answer:
 Chemical: Polyphosphates