Feather can be Light. you are likely to find Feather in/at/on Cage. 
Surface is related to Slope. Slope is related to Lift. Lift is related to Pick. Pick is a type of Remove. 
Light <--HasProperty-- Feather --AtLocation--> Cage 
Surface <--RelatedTo--> Slope <--RelatedTo--> Lift <--RelatedTo--> Pick --IsA--> Remove 