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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 goes a long way<sep>Tail: PersonX gets to london and is at the wrong place

Ex Output:
Yes


Ex Input:
Head: PersonX builds a treehouse<sep>Tail: PersonX climbs into the finished treehouse

Ex Output:
Yes


Ex Input:
Head: PersonX accidentally dropped ___ on the ground<sep>Tail: to clean the object

Ex Output:

No