Complex sentence: Diezani K. Alison-Madueke (born 6 December 1960) is a Nigerian politician who served as the first female President of OPEC, elected at the 166th OPEC Ordinary meeting in Vienna on 27 November 2014.
Split into simpler sentences: Diezani K. Alison-Madueke (born 6 December 1960) is a Nigerian politician and the first female President of OPEC. She was elected at the 166th OPEC Ordinary meeting in Vienna on 27 November 2014.