Complex sentence: John Chapman (1821-1894) was a publisher who had medical training and was based at 142 the Strand, London, acquired the philosophical radical journal the "Westminster Review" in 1851, and provided a platform for emerging ideas of evolution.
Split into simpler sentences: John Chapman (1821-1894) was a publisher who had medical training and was based at 142 the Strand, London. He acquired the philosophical radical journal the "Westminster Review" in 1851, and provided a platform for emerging ideas of evolution.