Throat is part of Shoe. Shoe is related to Step. 
Direction is related to Point. Point is part of Sword. Sword is similar to Knife. Knife is related to Edge. 
Throat --PartOf--> Shoe <--RelatedTo--> Step 
Direction <--RelatedTo--> Point --PartOf--> Sword <--SimilarTo--> Knife <--RelatedTo--> Edge 