Instructions: You will be given a context and a verb separated with a newline character, and you have to answer if the given verb is a negation or not. A verb is a negation if it is not going to exist, not happen, or has no effect. The output should be "Yes" if the verb is a negation and "No" otherwise.
Input: The American ambassador to Kenya was among hundreds injured, a local TV said.  It was definitely a bomb,  said a U.S. Embassy official in Nairobi, who refused to (identify) himself.  
 Verb: identify
Output:
Yes