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". 

Ex Input:
Event:PersonX buys a book. Intent: 1) to go

Ex Output:
Positive


Ex Input:
Event:PersonX never thought. Intent:

Ex Output:
Unknown


Ex Input:
Event:PersonX makes too much noise. Intent: 1) positive

Ex Output:

Negative