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Chlorpyrifos ( CPF ) is an organophosphate ( OP ) insecticide that is metabolically activated to the highly toxic chlorpyrifos oxon .
 Chemical: Chlorpyrifos; Chemical: CPF; Chemical: organophosphate; Chemical: chlorpyrifos oxon
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Chlorpyrifos; Chemical: CPF; Chemical: organophosphate; Chemical: chlorpyrifos oxon