Complex sentence: Charlotta Seuerling was daughter of Carl Gottfried Seuerling and Margareta Seuerling, actors and directors of a travelling theatre company, and she became blind at the age of four due to an incompetent smallpox vaccination.
Split into simpler sentences: Charlotta Seuerling was the daughter of Carl Gottfried Seuerling and Margareta Seuerling, actors and directors of a travelling theatre company. She became blind at the age of four due to an incompetent smallpox vaccination.