Complex sentence: For many years the damage to Bismarcks rudder was thought to have been caused by a torpedo launched by pilot John Moffat, however this claim has recently been challenged, according to naval historians cited by "The Times" newspaper in late October 2017.
Split into simpler sentences: For many years the damage to Bismarcks rudder was thought to have been caused by a torpedo launched by pilot John Moffat. However this claim has recently been challenged, according to naval historians cited by "The Times" newspaper in late October 2017.