Complex sentence: In 1903 Saldo added a new routine to the act which was designed to draw in large audiences, during which he supported a heavy motor car in the "Tomb of Hercules" position.
Split into simpler sentences: In 1903 Saldo added a new routine to the act which was designed to draw in large audinces. This was to support a motor car in the "Tomb of Hercules" position.