12890
Transcriptomic profiles revealed 21 , 62 , and 64 genes with altered expression in the 0 . 3 , 3 , and 30 ppb atrazine treatments , respectively .
 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