Complex sentence: His final undertaking was the construction of the Manchester Ship Canal which has been described as the greatest engineering achievement of Victorian times, whether this is true or not, it is certainly an immense achievement and transformed an inland city into a major port.
Split into simpler sentences: His final undertaking was the construction of the Manchester Ship Canal which has been described as the greatest engineering achievement of Victorian times. It is certainly an immense achievement and transformed an inland city into a major port.