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.

[EX Q]: Tuesday to sign a paper promising to turn over the boy to immigration authorities if they lose their federal court appeal. The Miami relatives thus far have (refused) to sign the document, and in recent days said they would not turn Elian over to his father if he came to the United States.
Verb: refused
[EX A]: Yes

[EX Q]: At the same time, we want to help Kenya prepare to meet future medical disasters, regardless of their cause. The bombings on Aug. 7 (killed) 259 people, including 12 Americans, and injured more than 5,500.
Verb: killed
[EX A]: No

[EX Q]: The raid was necessary because the Gonzalez relatives in Miami, refusing to return the boy, made him into a symbol of resistance to Fidel Castro. Elian printed his name on an application for asylum and was put in front of a video camera to say that he did not (want) to go back to Cuba.
Verb: want
[EX A]:
Yes