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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 looks back at PersonY<sep>Tail: PersonX hears the announcement

Ex Output:
Yes


Ex Input:
Head: PersonX drives PersonY back<sep>Tail: PersonX offers to give PersonY a ride

Ex Output:
Yes


Ex Input:
Head: PersonX crosses the aisle<sep>Tail: PersonX sees a product on the other side of the aisle

Ex Output:

Yes