You will be given a definition of a task first, then some input of the task.
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.

Castro has suggested that Elian and his relatives stay at the residence of Cuba's chief diplomat in Washington. Hidden in the entourage, cautioned Cuban Americans here, will be Cuban security agents who will make sure that Gonzalez _ and everyone else, for that matter _ does not (defect).  
 Verb: defect
Output:
Yes