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
The lawyer said he would appeal. The ruling does not necessarily (mean) that Mr. Sarkozy, who lost his re-election bid last May and with it his presidential immunity from prosecution, will stand trial.  
 Verb: mean
Answer:
Yes