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 is a substitute teacher. Intent: 1) to prevent a view 2) to hide something

Output: Unknown


Input: Consider Input: Event:It goes so well. Intent: 1) to lead a rich life

Output: Unknown


Input: Consider Input: Event:PersonX tells PersonY nothing. Intent:


Output: Negative