Walk is related to Transportation. Transportation is related to Ride. Parking is a type of Ride. 
Subject is related to Culture. Culture is related to Related. Related is related to Clock. Clock is related to Mechanism. 
Walk <--RelatedTo--> Transportation <--RelatedTo--> Ride <--IsA-- Parking 
Subject <--RelatedTo--> Culture <--RelatedTo--> Related <--RelatedTo--> Clock <--RelatedTo--> Mechanism 