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". 

Event:PersonX tries to cheer PersonY up. Intent: 1) to vent frustrations
Positive

Event:PersonX is so happy to see PersonY. Intent:
Unknown

Event:PersonX means ___ to people. Intent: 1) the truck

Unknown