23867
Given the small range in sensitivity observed between populations , commercial laboratory cultures appear to provide a good estimate of the sensitivity of field populations of L . minor to atrazine and should continue to be used in regulatory phytotoxicity testing .
 Chemical: atrazine
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: atrazine 
Answer:
 Chemical: atrazine