Part 1. Definition
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.
Part 2. Example
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
Answer: Yes
Explanation: This is a good example. Gonzalez refused to "claim" the boy. So, the claim didn't happen and it's a negation.
Part 3. Exercise
Justices Sandra Day O'Connor and Anthony Kennedy seemed to agree that the law amounted to unconstitutional sex discrimination. Butinstead of (providing) the votes to strike it down, they chose to uphold it on the flimsy ground that because the sex of the parent and not the child made the difference under the law, the plaintiff did not have standing to bring the case.  
 Verb: providing
Answer:
Yes