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". 

[EX Q]: Event:PersonX inhibits ___ in vitro. Intent: 1) this is not a rule for people
[EX A]: Positive

[EX Q]: Event:PersonX cuts off PersonY's retreat. Intent: 1) to get some more groceries
[EX A]: Negative

[EX Q]: Event:PersonX not gives PersonY the time of day. Intent:
[EX A]:
Negative