Complex sentence: With the prize money and the use of stables at his brother's house in West Hill, Putney, he then began to build a full size aeroplane, the Roe I Biplane, based on his winning model.
Split into simpler sentences: With the prize money and the use of stables at his brother's house in West Hill, Putney. He then began to build a full size aeroplane, the Roe I Biplane, based on his winning model.