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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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 Q]: Head: PersonX builds a treehouse<sep>Tail: PersonX climbs into the finished treehouse
[EX A]: Yes

[EX Q]: Head: PersonX accidentally stepped<sep>Tail: to walk somewhere else
[EX A]: No

[EX Q]: Head: PersonX presses PersonY's lips together<sep>Tail: PersonX was able to put the lipstick on
[EX A]:
Yes