Complex sentence: Norwegian truck driver Hjalmar Andersen electrified the partisan crowd by winning the 1,500,5,000 and 10,000 meter events; his margins of victory were the largest in Olympic history.
Split into simpler sentences: Norwegian truck driver Hjalmar Andersen electrified the partisan crowd by winning the 1,500,5,000 and 10,000 meter events. His margins of victory in the 5,000 and 10,000 meter races were the largest in Olympic history.