Complex sentence: In 1911, the island was purchased by Jacques Richepin, an author and playwright, who built the rotunda and the Chapelle des Aviateurs commemorating the first transatlantic flight from Europe to the United States by Dieudonné Costes and Maurice Bellonte in September 1930.
Split into simpler sentences: In 1911, the island was purchased by Jacques Richepin, an author and playwright. He built the rotunda and the Chapelle des Aviateurs commemorating the first transatlantic flight from Europe to the United States by Dieudonné Costes and Maurice Bellonte in September 1930.