Post is related to Bill. Bill is a synonym of Peak. Peak is part of Wave. Wave is related to Projection. 
House is related to Bed. you are likely to find Trash in/at/on Bed. Trash is related to Waste. Toilet can be used for Waste. 
Post <--RelatedTo--> Bill <--Synonym--> Peak --PartOf--> Wave <--RelatedTo--> Projection 
House <--RelatedTo--> Bed <--AtLocation-- Trash <--RelatedTo--> Waste <--UsedFor-- Toilet 