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.

Let me give you an 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
The answer to this example can be: Yes
Here is why: This is a good example. Gonzalez refused to "claim" the boy. So, the claim didn't happen and it's a negation.

OK. solve this:
It strongly condemns the  terrorist bomb attacks.  And it stresses that every nation  has the duty to refrain from (organizing), instigating, assisting or participating in terrorist acts in another state.   
 Verb: organizing
Answer:
No