Complex sentence: Born in Castelo de Paiva, Aveiro, Nunes began his professional career with modest clubs in the second and third divisions, and made his top flight debuts in 2001--02, with soon-to-be-extinct Sport Comércio e Salgueiros.
Split into simpler sentences: Born in Castelo de Paiva, Aveiro, Nunes began his professional career with modest clubs in the second and third divisions. He made his top flight debuts in 2001--02, with soon-to-be-extinct Sport Comércio e Salgueiros.