TASK DEFINITION: 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". 
PROBLEM: Event:PersonX tickles PersonY's funny bone. Intent: 1) to shake hands

SOLUTION: Positive

PROBLEM: Event:PersonX gets bad grades. Intent:

SOLUTION: Unknown

PROBLEM: Event:PersonX wants a new shirt. Intent:

SOLUTION:
Positive