Complex sentence: William Martin Conway, 1st (and last) Baron Conway of Allington (12 April 1856 at Rochester, England--19 April 1937 at London), English art critic, politician and mountaineer, was the son of Reverend William Conway, afterwards canon of Westminster.
Split into simpler sentences: William Martin Conway, 1st (and last) Baron Conway of Allington (12 April 1856 at Rochester, England--19 April 1937 at London) was an English art critic, politician and mountaineer. W. M. Conway was the son of Reverend William Conway, afterwards canon of Westminster.