Detailed 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.
Problem:HAVANA ( AP ) -- The grandmother of Elian Gonzalez said she is willing to go to Miami to bring the six-year-old boy home to Cuba, while Fidel Castro's point man on U.S. relations expressed impatience at Washington's failure to (enforce) a repatriation order.
Verb: enforce
Solution:
Yes