Complex sentence: In 1941, Wolstenholme qualified as a bomber pilot and was posted to 107 Squadron, flying Mark IV Bristol Blenheims out of RAF Great Massingham, Norfolk.
Split into simpler sentences: In 1941, Wolstenholme qualified as a bomber pilot and was posted to 107 Squadron, flying Bristol BlenheimMk. IVs out of RAF Great Massingham, Norfolk.