Complex sentence: Slovenian athletes first competed at the Olympics in Stockholm, at the 1912 Summer Olympics, as part of the Austrian team, when Rudolf Cvetko became the first Slovene to win an Olympic medal, a silver in the men's team sabre.
Split into simpler sentences: Slovenian athletes first competed at the Olympics in Stockholm, at the 1912 Summer Olympics, as part of the Austrian team. There, Rudolf Cvetko became the first Slovene to win an Olympic medal, a silver in the men's team sabre.