3250
The communities were exposed to esfenvalerate contamination as a single pulse ( at 0 . 03 , 0 . 3 , or 3 mu g / L ) and gradual removal of water and its subsequent replacement over three cycles and monitored until 84 days after contamination .
 esfenvalerate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 esfenvalerate