Complex sentence: Leonardo di ser Piero da Vinci (15 April 1452--2 May 1519) was an Italian polymath: painter, sculptor, architect, musician, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist, and writer.
Split into simpler sentences: Leonardo di ser Piero da Vinci (15 April 1452--2 May 1519) was an Italian polymath. He was a painter, sculptor, architect, musician, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist, and writer.