Direction is a type of Message. Mayor can be used for Direction. Mayor is related to Government. Government is related to Corruption. 
you are likely to find Cat in/at/on Cage. you are likely to find Cat in/at/on Laundry. Laundry is related to Tide. 
Message <--IsA-- Direction <--UsedFor-- Mayor <--RelatedTo--> Government <--RelatedTo--> Corruption 
Cage <--AtLocation-- Cat --AtLocation--> Laundry <--RelatedTo--> Tide 