Given the task definition and input, reply with output. 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.

Of course, it is still far too early to assume that the military situation on the ground will stay as smooth for allied forces as it appears to have been so far. Iraq still has the potential to cause significant problems by using forces and weapons that do n't yet seem fully (engaged).  
 Verb: engaged

Yes