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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 accepts the challenge<sep>Tail: ready to compete
No

Head: PersonX accidentally hit ___<sep>Tail: see if they can help
No

Head: PersonX thanks PersonY for PersonZ's help<sep>Tail: PersonX accepts the help

Yes