Complex sentence: Robert Gray was married to Sophy Myddleton, the daughter of county squire Richard Wharton Myddleton of Durham and Yorkshire, and founded Diocesan College, or Bishops as it is commonly known, in Rondebosch, Cape Town in 1849.
Split into simpler sentences: Robert Gray was married to Sophy Myddleton, the daughter of county squire Richard Wharton Myddleton of Durham and Yorkshire. He founded Diocesan College, or Bishops as it is commonly known, in Rondebosch, Cape Town in 1849.