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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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.

Input: Consider Input: Head: PersonX gets new pants<sep>Tail: PersonX throws the old pants away

Output: Yes


Input: Consider Input: Head: PersonX aces PersonX's exam<sep>Tail: passes class

Output: No


Input: Consider Input: Head: PersonX takes the elevator<sep>Tail: PersonX gets off the elevator at their floor


Output: Yes