Complex sentence: Harald Eriksson (or Ericsson, 22 September 1921--20 May 2015) was a Swedish cross-country skier who won the silver medal in the the 50 km event at the 1948 Winter Olympics in St. Moritz.
Split into simpler sentences: Harald Eriksson (September 22,1921--May 20,2015) was a Swedish cross-country skier who competed in the 1940s and 1950s. He won the 50 km silver at the 1948 Winter Olympics in St. Moritz.