Complex sentence: The fatalities included 11 crew members and 130 passengers, of which 3 were children, and was a contributing cause for Arktikugol's closure of Pyramiden two years later.
Split into simpler sentences: The fatalities included 11 crew members and 130 passengers, of which 3 were children. The accident was a contributing cause for Arktikugol's closure of Pyramiden two years later.