Complex sentence: The Fleetwings Sea Bird (or Seabird) was an amphibious utility aircraft designed in 1934-5 by James C. Reddig for Fleetwings, Inc., of Bristol, PA.
Split into simpler sentences: The Fleetwings Sea Bird (or Seabird) was a American-built amphibious aircraft of the 1930s. The Sea Bird was an amphibious utility aircraft designed in 1934-5 by James C. Reddig for Fleetwings, Inc., of Bristol, PA.