7481
Since PVP is hemocompatible and physiologically inactive , it has been used as a blood plasma substitute .
 Chemical: PVP
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: PVP 
Answer:
 Chemical: PVP