where did these popular aeroplanes - wright r-1820 cyclone and pratt & whitney r-2800 double wasp originate ?
SELECT DISTINCT var_uri where brack_open dbr_Wright_R-1820_Cyclone dbp_nationalOrigin var_uri sep_dot dbr_Pratt_&_Whitney_R-2800_Double_Wasp dbp_nationalOrigin var_uri brack_close