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.
He was last seen Nov. 3, the day before authorities issued a material witness warrant in the Slepian shooting in the hope of questioning him. Until Thursday, they had not (called) Kopp a suspect.
Verb: called
A:
Yes