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 prevents PersonY from entering. Intent: 1) to make sure his son is ok

SOLUTION: Negative

PROBLEM: Event:PersonX forgets to apply sunscreen. Intent: 1) to inform

SOLUTION: Unknown

PROBLEM: Event:PersonX feels prepared. Intent: 1) to be communal

SOLUTION:
Unknown