Complex sentence: Abdur Rahman Biswas (1 September 1926--3 November 2017) was the 11th President of Bangladesh during 1991 to 1996.
Split into simpler sentences: Abdur Rahman Biswas (1 September 1926--3 November 2017) was a Bangladeshi politician. He was the 11th President of Bangladesh during 1991 to 1996.