Complex sentence: In September 1871, "Warrior" began a refit that lasted until 1875, including a new poop deck and steam capstan, a shorter bowsprit, and replacement boilers.
Split into simpler sentences: In September 1871, "Warrior" began a refit that lasted until 1875. The work carried out included a new poop deck and steam capstan, a shorter bowsprit, and replacement boilers.