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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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

Head: PersonX accidentally knocked ___<sep>Tail: to say sorry
No

Head: PersonX loses PersonX's position<sep>Tail: PersonX has to walk to the back of the line
Yes

Head: PersonX stands in PersonY's way<sep>Tail: PersonX won't let PersonY pass

Yes