Complex sentence: General Sani Abacha (20 September 1943--8 June 1998) was a Nigerian soldier and politician who served as the "de facto" President of Nigeria from 1993 to 1998.
Split into simpler sentences: General Sani Abacha (20 September 1943--8 June 1998) was a Nigerian soldier and politician. He was the "de facto" President of Nigeria from 1993 to 1998.