Complex sentence: The Schools collaborated at the Edinburgh Fringe in an event at the Royal College of Physicians of Edinburgh, where a 50-strong group from Fukien met over 100 Sandbach pupils and staff.
Split into simpler sentences: The Schools collaborated at the Edinburgh Fringe with the event taking place at Royal College of Physicians of Edinburgh. There was a 50 strong group from Fukien meeting over 100 Sandbach pupils and staff.