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 loses PersonY's car keys. Intent: 1) to learn something new
Unknown

Event:PersonX ties the ___ together. Intent: 1) to talk about persony 2) to solve something
Positive

Event:PersonX never try. Intent: 1) persistent

Negative