Complex sentence: Lieutenant-Colonel George Gawler, KH, (21 July 1795--7 May 1869) was the second governor of South Australia; from 17 October 1838 until 15 May 1841.
Split into simpler sentences: Lieutenant-Colonel George Gawler, KH (21 July 1795--7 May 1869) was the second governor of South Australia. He was governor from 17 October 1838 until 15 May 1841.