TASK DEFINITION: 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.
PROBLEM: WASHINGTON ( AP ) -- Secretary of State Madeleine Albright has invited the foreign ministers of Poland, the Czech Republic and Hungary to a ceremony in Independence, Mo., on March 12 to (mark) the accession of the three countries into the NATO alliance.  
 Verb: mark

SOLUTION: No

PROBLEM: Extending membership to these three democracies helps to stabilize a region that historically has been the staging ground for many of the disasters of this century.  But many Russians -- and some Americans -- (are) wary about the eastward encroachment of NATO.  
 Verb: are

SOLUTION: No

PROBLEM: Just what NATO will do with these eager applicants is not clear. The issue is (expected) to dominate a NATO summit set for Washington in April.  
 Verb: expected

SOLUTION:
No

