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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 after 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 tries to walk<sep>Tail: PersonX breaks their ankle
Example Output: Yes

Example Input: Head: PersonX attracts PersonY attention<sep>Tail: PersonX needs to get some help
Example Output: Yes

Example Input: Head: PersonX develops PersonY system<sep>Tail: PersonX writes out code
Example Output:
Yes