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 grabs PersonY's backpack. Intent: 1) to give person y something
Negative

Event:PersonX waits all year. Intent: 1) to grab some bread
Unknown

Event:PersonX hits PersonX's car. Intent:

Unknown