Complex sentence: The film is now mostly lost, although one badly damaged reel was salvaged from the RMS "Lusitania" in 1982, and the BFI National Archive was able to recover images from several feet of the film.
Split into simpler sentences: The film is now lost, except for one badly damaged reel was salvaged from the RMS "Lusitania" in 1982. The BFI National Archive was able to recover images from several feet of the film.