Complex sentence: Boualem Rahoui (born 8 October 1948) is a retired Algerian long-distance runner who specialized in the 3000 metres steeplechase, 5000 metres and 10,000 metres.
Split into simpler sentences: Boualem Rahoui (born 8 October 1948) is a retired Algerian long-distance runner. He specialized in the 3000 metres steeplechase, 5000 metres and 10,000 metres.