5189
Meanwhile , light environment is known to vary between aquatic ecosystems , but also before and during the exposure to atrazine and these variations may modify the sensitivity to atrazine of photoautotroph organisms .
 Chemical: atrazine; Chemical: atrazine
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: atrazine; Chemical: atrazine