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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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

Ex Input:
Head: PersonX stands on PersonY's legs<sep>Tail: PersonX climbs on the stage

Ex Output:
Yes


Ex Input:
Head: PersonX sees an advertisement<sep>Tail: PersonX picks up the paper

Ex Output:
Yes


Ex Input:
Head: PersonX accepts the challenge<sep>Tail: ready to compete

Ex Output:

No