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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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

Head: PersonX would not turn on<sep>Tail: PersonX was sitting in the dark
Yes

Head: PersonX aces the test<sep>Tail: to study hard
No

Head: PersonX acknowledges gratefully the ___<sep>Tail: smiles

No