which country gave birth to the general electric j31 and pratt & whitney r-2180-e twin wasp e aircrafts ?
SELECT DISTINCT var_uri where brack_open dbr_General_Electric_J31 dbp_nationalOrigin var_uri sep_dot dbr_Pratt_&_Whitney_R-2180-E_Twin_Wasp_E dbp_nationalOrigin var_uri brack_close