21889
Atrazine is one of the most used pesticides all over the world and it is frequently detected in surface water .
 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