12489
We exposed wood frog tadpoles from 15 populations to three acetylcholine esterase - inhibiting insecticides and found widespread variation in insecticide tolerance and evidence for cross - tolerance to these insecticides .
 Chemical: acetylcholine
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: acetylcholine