Complex sentence: The cross-country skiing competition was once again a display of power from Nordic countries: from the 24 medals in dispute, 17 were won by athletes from Finland (8), Sweden (5), and Norway (4).
Split into simpler sentences: The cross-country skiing competition was again a display of power from Nordic countries. From the 24 medals in dispute, 17 were won by athletes from Finland (8), Sweden (5), and Norway (4).