The house 7, wherein said ventilation system further comprises four lower compartments that are tubular and are disposed in said lower compartment holding space of said main portion and extend vertically from {HEAD ~ said lowermost floor} of said main portion to said uppermost floor of {TAIL ~ said main portion} 
The house 7 , wherein said ventilation system further comprises four lower compartments that are tubular and are disposed in said lower compartment holding space of said main portion and extend vertically from { HEAD ~ said lowermost floor } of said main portion to said uppermost floor of { TAIL ~ said main portion }
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