Boat is related to Ride. Ride is related to Motion. Motion is related to Fly. 
Bill is related to Duck. Duck is related to Game. Game is related to Hockey. 
Boat <--RelatedTo--> Ride <--RelatedTo--> Motion <--RelatedTo--> Fly 
Bill <--RelatedTo--> Duck <--RelatedTo--> Game <--RelatedTo--> Hockey 