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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 knows the answers<sep>Tail: PersonX gets a grade of 100
Example Output: Yes

Example Input: Head: PersonX absolutely loved it<sep>Tail: buys it
Example Output: No

Example Input: Head: PersonX likes it at first<sep>Tail: PersonX spits out the fruit when the taste turns too tart
Example Output:
Yes