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 points fingers. Intent: 1) to be of use
Negative

Event:PersonX takes two hours. Intent: 1) surprised 2) grateful 3) happy
Negative

Event:PersonX demands a refund. Intent:

Negative