Complex sentence: A Nigerian of Yoruba descent, Obasanjo was a career soldier before serving twice as his nation's head of state, as a military ruler from 13 February 1976 to 1 October 1979 and as a democratically elected president from 29 May 1999 to 29 May 2007.
Split into simpler sentences: A Nigerian of Yoruba descent, Obasanjo was a career soldier before serving twice as his nation's head of state. He served as a military ruler from 13 February 1976 to 1 October 1979, and as a democratically elected president from 29 May 1999 to 29 May 2007.