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 makes PersonY jealous. Intent: 1) to be a friend 2) to celebrate a birthday
Negative

Event:It never heard. Intent:
Unknown

Event:PersonX plays darts. Intent: 1) to ensure their saftey

Positive