premise: On your way through the Italian rooms, be sure to keep an eye peeled for Fra Angelico's glowing and stupendous Annunciation, as well as for Antonello da Messina's realistically detailed, intensely tragic Christ Sustained by an Angel, and Sandro Botticelli's The Story of Nastagio Degli Onesti.
hypothesis: Be sure to keep an eye peeled for Fra Angelico's glowing and stupdendous Annunciation and other things, when you are on your way through the Italian rooms.