Complex sentence: Born in Castiglione del Lago, Umbria to Nigerian parents who later obtained Italian citizenship, Okaka joined the Roma youth system in 2004, winning the U- 20 national title in 2005, scoring goals against Juventus in the semi-final, and Atalanta in the final.
Split into simpler sentences: Born in Castiglione del Lago, Umbria, Italy to Nigerian parents who later obtained Italian citizenship, Okaka joined the Roma youth system in 2004. He was part of the team that won the U- 20 national title in 2005 and scored goals against Juventus in the semi-final and Atalanta in the final.