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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 accepts without question<sep>Tail: to say thanks

Ex Output:
No


Ex Input:
Head: PersonX improves PersonX's typing speed<sep>Tail: PersonX takes a computer course

Ex Output:
Yes


Ex Input:
Head: PersonX expects PersonY answer<sep>Tail: PersonX asks PersonY a question

Ex Output:

Yes