Debris is related to Waste. Waste is a different concept from Save. Save is related to Keep. Keep is a type of Stay. 
Foreign is related to Trade. Trade is related to Job. Job is related to Photograph. 
Debris <--RelatedTo--> Waste <--DistinctFrom--> Save <--RelatedTo--> Keep --IsA--> Stay 
Foreign <--RelatedTo--> Trade <--RelatedTo--> Job <--RelatedTo--> Photograph 