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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 acts as PersonY intermediary<sep>Tail: to be trusted by PersonY
Example Output: No

Example Input: Head: PersonX divides the pizza into sections<sep>Tail: PersonX eats pizza with his friends
Example Output: Yes

Example Input: Head: PersonX climbs the tree<sep>Tail: PersonX picks some apples
Example Output:
Yes