Stage is related to Space. Space is related to Desk. Desk is related to Workplace. 
Surface is made of Material. Surface is related to Chair. Chair is related to Instrument. Instrument is related to Mechanical. 
Stage <--RelatedTo--> Space <--RelatedTo--> Desk <--RelatedTo--> Workplace 
Material <--MadeOf-- Surface <--RelatedTo--> Chair <--RelatedTo--> Instrument <--RelatedTo--> Mechanical 