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". 

Input: Consider Input: Event:PersonX buys a birthday cake. Intent: 1) to go over their authority.

Output: Positive


Input: Consider Input: Event:PersonX has writer 's block. Intent: 1) to finish what they've started

Output: Unknown


Input: Consider Input: Event:PersonX lasts PersonY a lifetime. Intent: 1) love in return


Output: Unknown