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 is right next to PersonY. Intent: 1) to help.
Unknown

Event:PersonX watches PersonY's face. Intent: 1) to bring something with personx
Unknown

Event:PersonX kills PersonY's mother. Intent: 1) to reminisce 2) see if somethings clean

Negative