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 buys a birthday cake. Intent: 1) to go over their authority.
[EX A]: Positive

[EX Q]: Event:PersonX takes ___ away. Intent: 1) to be nice
[EX A]: Negative

[EX Q]: Event:PersonX studies all week. Intent: 1) his friend to come.
[EX A]:
Positive