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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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

Ex Input:
Head: PersonX acknowledges with gratitude the ___<sep>Tail: grateful

Ex Output:
No


Ex Input:
Head: PersonX sends photos with submission<sep>Tail: PersonX gets the photos back

Ex Output:
Yes


Ex Input:
Head: PersonX visits PersonX's brother<sep>Tail: PersonX gives PersonX's brother a hug

Ex Output:

Yes