Complex sentence: A British passenger, 62-year-old businessman Chris Norman, and an unidentified Frenchman came to their aid to hold the gunman down, and they used his T-shirt to tie his arms behind his back.
Split into simpler sentences: A British passenger, 62-year-old businessman Chris Norman, and an unidentified Frenchman came to their aid to hold the gunman down. They used Norman's T-shirt to tie his arms behind his back.