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.
One example is below.
Q: Only the government of the United States can decide if it prefers this variant, continued the letter, which Castro read on a state television station broadcast. Gonzalez for months refused requests by Elian's Miami relatives to go to the United States to (claim) the boy.  
 Verb: claim
A: Yes
Rationale: This is a good example. Gonzalez refused to "claim" the boy. So, the claim didn't happen and it's a negation.
Q: It was definitely a bomb,  said a U.S. Embassy official in Nairobi, who refused to identify himself.  You can see a huge crater behind the building, and a bomb went off at the embassy in Tanzania at the same time,  he (said).  
 Verb: said
A:
No