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 sees ___ on the street. Intent:

SOLUTION: Unknown

PROBLEM: Event:PersonX creates PersonY opportunity. Intent: 1) to be sure

SOLUTION: Positive

PROBLEM: Event:PersonX instantly fell. Intent:

SOLUTION:
Unknown