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". 

Example Input: Event:PersonX drives ___ away. Intent: 1) to catch up with them
Example Output: Positive

Example Input: Event:PersonX lands on PersonX's head. Intent: 1) to know it in detail
Example Output: Unknown

Example Input: Event:It drops one. Intent:
Example Output:
Unknown