Afford is related to Purchase. Purchase is related to Cost. Cost is related to Required. 
Stage is related to Front. Front is a synonym of Face. Face is part of Animal. Elephant is a type of Animal. 
Afford <--RelatedTo--> Purchase <--RelatedTo--> Cost <--RelatedTo--> Required 
Stage <--RelatedTo--> Front <--Synonym--> Face --PartOf--> Animal <--IsA-- Elephant 