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.

[Q]: The search for Kopp was recently extended to Mexico. Meantime, FBI agents and Metropolitan Police officers (assigned) to a joint terrorism task force here scanned the crowd of anti-abortion protesters at the annual March for Life on Capitol Hill, because Kopp has been either a participant in or arrested at this march in each of the last three years, according to another law enforcement official,
Verb: assigned
[A]: No

[Q]: In Dar es Salaam, she laid a wreath next to the crater left by the embassy blast that killed 10 people. Then she handed a folded American flag to U.S. Marines and, wearing a white construction hard hat, (toured) the damage inside.
Verb: toured
[A]: No

[Q]: StatesWest Airlines, Phoenix, Ariz., said it withdrew its offer to acquire Mesa Airlines because the Farmington, N.M., carrier did n't respond to its offer by the close of business yesterday, a deadline StatesWest had set for a response. However, StatesWest is n't (abandoning) its pursuit of the much-larger Mesa.
Verb: abandoning
[A]:
Yes