Complex sentence: Roberto Parra Mateo (born 6 April 1976 in Socuéllanos, Ciudad Real) is a Spanish middle distance runner who specialized in the 800 and 1500 metres events.
Split into simpler sentences: Roberto Parra Mateo (born 6 April 1976 in Socuéllanos, Ciudad Real) is a Spanish middle distance runner. He specialized in the 800 and 1500 metres events.