22619
Inhibition of ATM by the pharmacological inhibitor caffeine or siRNA effectively prevented the activation of ATM - dependent pathways and rescued the G2 arrest elicited by OTA .
 Chemical: OTA
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: OTA