Instructions: 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.
Input: In composite trading on the New York Stock Exchange yesterday, Upjohn shares rose 87.5 cents to $38.875 apiece. An Upjohn spokesman said he had " (heard) nothing " to suggest the early retirement package was spurred by shareholder pressure or a potential bidder for the company, which occasionally has been the target of takeover speculation.
Verb: heard
Output:
Yes