Opening is related to Key. Key is related to Master. Master is similar to Principal. 
Strip is related to Column. Column is a type of Beam. Beam is related to Building. Building is related to Shade. 
Opening <--RelatedTo--> Key <--RelatedTo--> Master <--SimilarTo--> Principal 
Strip <--RelatedTo--> Column --IsA--> Beam <--RelatedTo--> Building <--RelatedTo--> Shade 