Complex sentence: Wilson's Hospital School was founded in 1761 by Andrew Wilson as a school for young Protestant boys (often of limited means) and also as a hospital for old men, some of whom were retired soldiers.
Split into simpler sentences: Wilson's Hospital School was founded in 1761 by Andrew Wilson. It was founded as a school for young Protestant boys (often of limited means) and also as a hospital for old men, some of whom were retired soldiers.