Complex sentence: Pwllheli is also a hub for water sports, due in part to a large and modern marina, Pwllheli Sailing Club, and Plas Heli-the Welsh National Sailing Academy.
Split into simpler sentences: Pwllheli is also a hub for water sports. It is home to a large and modern marina, Pwllheli Sailing Club, and Plas Heli-the Welsh National Sailing Academy.