7008
These results demonstrate that human serum PON1 is could be involved in the detoxification of a limited number of organophosphorus insecticides .
 Chemical: organophosphorus
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: organophosphorus 
Answer:
 Chemical: organophosphorus