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Generally , nutrients stimulated , and atrazine reduced chlorophyll a ( Chl a ) in chambers .
 Chemical: atrazine; Chemical: chlorophyll a; Chemical: Chl a
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: chlorophyll a; Chemical: Chl a