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.

The attack was lightning quick, as allied forces punched through tall sand berms on the border and pushed forward into Iraq and Kuwait. U.S. Marines were said to have breached troublesome mine fields along the Iraqi lines but Pentagon officials said no amphibious assault on Kuwait's beaches had (begun).  
 Verb: begun
Yes