Complex sentence: St. Bernard's School was founded in 1900 by the Rev. Thomas A. Conover as a school for farm and village boys in which they could be educated as they learned a trade.
Split into simpler sentences: St. Bernard's School was founded in 1900 by the Rev. Thomas A. Conover. It was his vision to establish a school for farm and village boys in which they could be educated at the same time as they learned a trade.