Complex sentence: The raiding force was attacked on 27 December 1941 by a German seaplane which bombed the cruiser "Arethusa", although it was not hit it did suffer some damage which would require 14 weeks in dock to repair.
Split into simpler sentences: The raiding force was attacked on 27 December 1941 by a German seaplane that bombed the cruiser "Arethusa". Although it was not hit, it did suffer some damage that would require 14 weeks in dock to repair.