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