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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 gets new pants<sep>Tail: PersonX throws the old pants away

Ex Output:
Yes


Ex Input:
Head: PersonX unpacks PersonY's things<sep>Tail: PersonX puts items in the dresser

Ex Output:
Yes


Ex Input:
Head: PersonX gives PersonY a smile<sep>Tail: PersonX waits on PersonY to smile back

Ex Output:

Yes