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 inhibits ___ in vitro. Intent: 1) this is not a rule for people
Positive

Event:PersonX leaves the gate open. Intent:
Negative

Event:PersonX buys a new truck. Intent: 1) to stop from licking

Positive