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 sees the ocean. Intent: 1) to be nice
Positive

Event:PersonX buys a book. Intent: 1) to go
Positive

Event:PersonX starts choking. Intent: 1) to help fight

Unknown