which subsidiary of norwegian air shuttle serves both leonardo da vinci–fiumicino airport and oslo airport ?
select distinct var_uri where brack_open dbr_Norwegian_Air_Shuttle dbo_subsidiary var_uri sep_dot var_uri dbo_targetAirport dbr_Leonardo_da_Vinci–Fiumicino_Airport sep_dot var_uri dbo_targetAirport dbr_Oslo_Airport,_Gardermoen sep_dot brack_close