Teacher: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.
Teacher: Now, understand the problem? Solve this instance: The Web site included the names and addresses of abortion doctors and featured photos of mangled fetuses and drawings of dripping blood. Three times, doctors whose names appeared on the list were (killed), most recently last October when Dr. Barnett Slepian was gunned down by sniper fire in his home outside Buffalo, N.Y. His name on the Web site was crossed out that same day.  
 Verb: killed
Student:
No