Complex sentence: "The Plant List" also attracted attention for building on the work of English naturalist Charles Darwin, who in the 1880s started a plant list entitled Index Kewensis that contained 400,000 names of species.
Split into simpler sentences: "The Plant List" also attracted attention for building on the work of English naturalist Charles Darwin. A plant list entitled Index Kewensis was started by Darwin in the 1880s, and contained 400,000 names of species.