Complex sentence: In 1791 Smirke was elected an associate of the Royal Academy, in which year he exhibited "The Widow", and became an academician in 1793, when he painted as his diploma work "Don Quixote and Sancho".
Split into simpler sentences: In 1791 Smirke was elected an associate of the Royal Academy, in which year he exhibited "The Widow". He became a full academician in 1793, when he painted as his diploma work "Don Quixote and Sancho".