You will be given a definition of a task first, then some input 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.

The issue is expected to dominate a NATO summit set for Washington in April. NATO's mission has changed dramatically since its founding in 1949, a time when the West was intent on halting the westward spread of Soviet-led communism -- a threat Winston Churchill warned about in his famous  Iron Curtain  speech (delivered) on March 5, 1946, at Westminster College in Fulton, Mo., 130 miles east of here.  
 Verb: delivered
Output:
No