You are provided with an "Event" and it's "Intent" related to PersonX. Determine the sentiment value of the given input as either "Positive", "Negative", and "Unknown". 

Event:PersonX darkens PersonY's door. Intent: 1) to entertain himself/herself
Negative

Event:PersonX notices another ___. Intent: 1) happy
Unknown

Event:PersonX is a student in high school. Intent: 1) to teah persony to drive

Positive