Complex sentence: Two salvers at the Metropolitan Museum of Art were attributed to the Studio of Lorenzo di Niccolò by the art historians, Elizabeth Gardner and Federico Zeri; the subject of the works has been proposed to be a story from Boccaccio's "Comedia delle Ninfe Fiorentine".
Split into simpler sentences: Two salvers at the Metropolitan Museum of Art were attributed to the Studio of Lorenzo di Niccolò by the art historians Elizabeth Gardner and Federico Zeri. It has been proposed that the subject of these salvers is a story from Boccaccio's "Comedia delle Ninfe Fiorentine".