Complex sentence: Others are Abraham Cresques, a 14th-century Jewish cartographer of the Majorcan cartographic school from Palma, believed to be the author of the Catalan Atlas.
Split into simpler sentences: Others are Abraham Cresques, a 14th-century Jewish cartographer of the Majorcan cartographic school from Palma. Cresques is believed to be the author of the Catalan Atlas.