You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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
Solution: Yes
Why? This is a good example. Gonzalez refused to "claim" the boy. So, the claim didn't happen and it's a negation.

New input: We are friends.  He also urged Albright to (tell) Americans that Tanzania is safe and they should continue visiting and investing in the country.  
 Verb: tell
Solution:
No