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.
Input: NAIROBI, Kenya ( AP ) _ U.S. Surgeon General David Satcher on Wednesday (led) a team of medical specialists to Africa to help victims of terrorist attacks on the U.S. embassies in Kenya and Tanzania.  
 Verb: led
Output:
No