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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 asks the librarian<sep>Tail: PersonX finds the book with help

Output: Yes


Input: Consider Input: Head: PersonX works closely with PersonY<sep>Tail: PersonX takes notes of how to perform like PersonY

Output: Yes


Input: Consider Input: Head: PersonX closes the stable door after the horse has bolted<sep>Tail: PersonX chases down the horse


Output: Yes