TASK DEFINITION: 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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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.
PROBLEM: Head: PersonX steps away<sep>Tail: PersonX hides behind a tree

SOLUTION: Yes

PROBLEM: Head: PersonX leaves PersonY soon<sep>Tail: PersonX is sad and misses PersonY very much

SOLUTION: Yes

PROBLEM: Head: PersonX finally sat down<sep>Tail: PersonX thenext person gives an differnt angle of the presenttation

SOLUTION:
Yes