Complex sentence: In 1929, the 725 Cubic Inch Class was introduced by the Mississippi Valley Power Boat Association (MVPBA), the majority of these boats were powered by Hispano-Suiza 8 aircraft engines or Curtiss OX-5s.
Split into simpler sentences: In 1929, the 725 Cubic Inch Class was introduced by the Mississippi Valley Power Boat Association (MVPBA). The majority of these boats were powered by Hispano-Suiza 8 aircraft engines or Curtiss OX-5s.