Complex sentence: Only a single example of the Saab 18 survives today: a B 18B, "Red David", at the Swedish Air Force Museum, one of a group of eight aircraft lost in a snowstorm in 1946, that was recovered and restored in 1979.
Split into simpler sentences: Only a single example of the Saab 18 survives today: a B 18B, named "Red David". One of a group of eight aircraft lost in a snowstorm in 1946, it was recovered and restored in 1979.