6172
Atrazine ( 10 - 20 mu g L ( - 1 ) in the wetland ) had a positive relationship with ash - free dry mass ( AFDM ) , and weakened the relationship between TN and AFDM .
 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