Placement is related to Step. Step is related to Height. Height is related to Tower. 
American is related to Tribe. Goat is part of Tribe. Goat is related to Boat. Boat is related to Activity. 
Placement <--RelatedTo--> Step <--RelatedTo--> Height <--RelatedTo--> Tower 
American <--RelatedTo--> Tribe <--PartOf-- Goat <--RelatedTo--> Boat <--RelatedTo--> Activity 