Bottom is a type of Region. Air is a type of Region. 
Sofa can be used for Fucking. you are likely to find Sofa in/at/on House. House is related to Camp. Camp is related to Residence. 
Bottom --IsA--> Region <--IsA-- Air 
Fucking <--UsedFor-- Sofa --AtLocation--> House <--RelatedTo--> Camp <--RelatedTo--> Residence 