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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 sees every person<sep>Tail: PersonX waves to their friends

Output: Yes


Input: Consider Input: Head: PersonX accomplishes PersonX's mission<sep>Tail: to show off skills

Output: No


Input: Consider Input: Head: PersonX goes back to my room<sep>Tail: PersonX exclaims at how delicious lunch looks


Output: Yes