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.

This more extensive set of tests could enable officials to declare an absolute match between the two hair strands, the first law enforcement official said.  Ultimately, we would need to have a hair taken directly from Kopp himself to (establish) conclusively the hair from scene is his,  the official added.  
 Verb: establish
No