Complex sentence: SS "Mahratta" was a steamship owned by Brocklebank Line which was launched in 1917 and ran aground in the English Channel on the Goodwin Sands in 1939.
Split into simpler sentences: SS "Mahratta" was a steamship owned by Brocklebank Line. Launched in 1917, SS Mahratta (1917) ran aground in the English Channel on the Goodwin Sands twenty-two years later in 1939.