Complex sentence: Born in Porto, Magalhães was 14 when he joined local powerhouse Futebol Clube do Porto's youth system, making his senior debuts four years later, as the northerners were then coached by Austrian Hermann Stessl.
Split into simpler sentences: Born in Porto, Magalhães was 14 when he joined local powerhouse Futebol Clube do Porto's youth system. He made his senior debut four years later, as the northerners were then coached by Austrian Hermann Stessl.