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 The names of specific people have been replaced by generic words (e.g., PersonX, PersonY, PersonZ).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

Example Input: Head: sun<sep>Tail: life on earth
Example Output: Yes

Example Input: Head: sin<sep>Tail: death
Example Output: Yes

Example Input: Head: drug use<sep>Tail: physical or psychological illness
Example Output:
Yes