Complex sentence: On one occassion a Tigers fan was arrested at Sheffield United's ground for throwing an orange to Ian; the Sheffield police were not aware of the ritual and Ian had to write to the court in defence of the arrested fan.
Split into simpler sentences: On one occassion a Tigers fan was arrested at Sheffield United's ground for throwing an orange to Ian. It appeared the Sheffield Police were not aware of the ritual and Ian had to write to the court in defence of the arrested fan.