Computer can be used for Learn. you are likely to find Bus in/at/on Computer. Window is part of Bus. Window is related to Construction. 
you are likely to find Darkness in/at/on Bed. Bed is a type of Foundation. 
Learn <--UsedFor-- Computer <--AtLocation-- Bus <--PartOf-- Window <--RelatedTo--> Construction 
Darkness --AtLocation--> Bed --IsA--> Foundation 