Complex sentence: Sjöberg has a gold medal from the World Championships in Rome 1987 and has three Olympic medals, silver medals from Los Angeles 1984 and Barcelona 1992, and a bronze medal from Seoul 1988.
Split into simpler sentences: Sjöberg has a gold medal from the World Championships in Rome 1987 and has 3 olympic medals. Two silver medals from Los Angeles 1984 and Barcelona 1992 and one bronze medal from Seoul 1988.