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.

WASHINGTON ( AP ) -- Preliminary DNA tests (link) a missing anti-abortion activist to a strand of hair found near where a sniper shot and killed a Buffalo, N.Y., doctor who performed abortions, a law enforcement official said Friday.
Verb: link
No

Even before the killing, Schumer was tyring to draw more attention to the anti-abortion record of his opponent, Senator Alfonse D'Amato, a Republican who is also running on the Right to Life Party line. In a New York Times / CBS News poll completed on Saturday, 69 percent of those polled said they did not (know) D'Amato's position on abortion, and only 19 percent knew that he opposed abortion rights.
Verb: know
Yes

The White House said President Bush has approved duty-free treatment for imports of certain types of watches that are n't (produced) in " significant quantities " in the U.S., the Virgin Islands and other U.S. possessions.
Verb: produced
Yes