16886
The effects of different chlorpyrifos concentrations were examined in a standardised test ( two - chamber system ) with 0 . 6 , 3 and 15 mg / kg chlorpyrifos .
 Chemical: chlorpyrifos; Chemical: chlorpyrifos
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: chlorpyrifos