Complex sentence: Damad Mehmed Ali Pasha (1813-1868) was an Ottoman Grand Vizier from 3rd October, 1852 until 14th May, 1853, on the eve of the Crimean War.
Split into simpler sentences: Damad Mehmed Ali Pasha (1813-1868) was an Ottoman statesman and diplomat. He served as the Grand Vizier from 3rd October, 1852 until 14th May, 1853, on the eve of the Crimean War.