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". 

[Q]: Event:It works just fine. Intent: 1) to communicate
[A]: Unknown


[Q]: Event:PersonX prevents PersonY from entering. Intent: 1) to make sure his son is ok
[A]: Negative


[Q]: Event:PersonX asks friends. Intent: 1) to prevent unwanted calls
[A]:
Positive


