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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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

Example Input: Head: PersonX builds a treehouse<sep>Tail: PersonX climbs into the finished treehouse
Example Output: Yes

Example Input: Head: PersonX accomplishes the ___ in view<sep>Tail: successful
Example Output: No

Example Input: Head: PersonX looks forward to PersonY<sep>Tail: PersonX goes on vacation to see PersonY
Example Output:
Yes