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 knows PersonY's ___ thoroughly. Intent: 1) to grab something
Example Output: Positive

Example Input: Event:PersonX continues PersonX's studies. Intent: 1) to improve
Example Output: Positive

Example Input: Event:PersonX becomes tired. Intent: 1) to save him
Example Output:
Unknown