Angel is related to Flying. Flying is related to Wind. Window is derived from Wind. Window is a type of Framework. 
you are likely to find Cat in/at/on Couch. you are likely to find Cat in/at/on Roof. Roof is related to Cover. 
Angel <--RelatedTo--> Flying <--RelatedTo--> Wind <--DerivedFrom-- Window --IsA--> Framework 
Couch <--AtLocation-- Cat --AtLocation--> Roof <--RelatedTo--> Cover 