Complex sentence: In 1849, the Scotts moved back to Oxford, where Dr. Scott became the first president of the Oxford Female Institute in the former Temperance Tavern, which he had purchased in 1841.
Split into simpler sentences: In 1849, the Scotts returned to Oxford, as where Dr. Scott was selected as the first president of the Oxford Female Institute. It was held in the former Temperance Tavern, which he had purchased in 1841.