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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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.
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Question: Head: PersonX acts strange<sep>Tail: none

Answer: No


Question: Head: PersonX can n't see anything<sep>Tail: PersonX gets bleach in eyes

Answer: Yes


Question: Head: PersonX starts chasing PersonY<sep>Tail: PersonX challenges PersonY to a race

Answer:
Yes