Q: 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.
In the air, U.S. Air Force fliers say they have engaged in  a little cat and mouse  with Iraqi warplanes, which have retreated when weapons radar locks onto them.  They do n't (want) to play with us,  one U.S. crew chief said.  
 Verb: want
A:
Yes