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 Q]: Event:PersonX changes PersonY's attitudes. Intent: 1) there to be juctice
[EX A]: Positive

[EX Q]: Event:PersonX plays a prank. Intent:
[EX A]: Negative

[EX Q]: Event:PersonX cracks a smile. Intent: 1) to be nice
[EX A]:
Unknown