Potato can be used for Eating. Potato is related to Couch. Couch is related to Furniture. Bench is a type of Furniture. 
you are likely to find Expansion in/at/on Universe. Expansion is a type of Discussion. Discussion is a synonym of Word. Ultimate is a type of Word. 
Eating <--UsedFor-- Potato <--RelatedTo--> Couch <--RelatedTo--> Furniture <--IsA-- Bench 
Universe <--AtLocation-- Expansion --IsA--> Discussion <--Synonym--> Word <--IsA-- Ultimate 