Complex sentence: Jesús María Sanromá (November 7,1902--October 12,1984) was a Puerto Rican pianist who is one of the 20th century's most accomplished and important pianists.
Split into simpler sentences: Jesús María Sanromá (November 7,1902--October 12,1984) was a Puerto Rican pianist. He is considered by many to be one of the 20th century's most accomplished and important pianists.