Note is a type of Message. Guidance is a type of Message. Minister can be used for Guidance. 
Closed is the opposite of Open. Open is a different concept from Reserve. Reserve is related to Serve. Service is derived from Serve. 
Note --IsA--> Message <--IsA-- Guidance <--UsedFor-- Minister 
Closed <--Antonym--> Open <--DistinctFrom--> Reserve <--RelatedTo--> Serve <--DerivedFrom-- Service 