In this task, you are given two phrases: Head and Tail, separated with <sep>. The Head and the Tail events are short phrases possibly involving participants. The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ). PersonX is always the subject of the event. You have to determine whether the Head happens before the Tail or not. Classify your answers into "Yes" and "No". The phrase may also contain "___", a placeholder that can be an object, a person, and/or an action.

Ex Input:
Head: PersonX gives the gift<sep>Tail: PersonX watches closely to see how the gift was enjoyed

Ex Output:
Yes


Ex Input:
Head: PersonX accepts another ___<sep>Tail: becomes more full

Ex Output:
No


Ex Input:
Head: PersonX accuses PersonY of cheating<sep>Tail: to make him understand

Ex Output:

No