Complex sentence: In the "Second Chance" round, he was in the best four songs after the first two rounds of voting, and he won his duel against Martin Rolinski and went on to win the entire Melodifestivalen on the 9th of March 2013.
Split into simpler sentences: In the "Second Chance" round, he was in the best four songs after the first two rounds of voting, and he won his duel against Martin Rolinski. He went on to win the entire Melodifestivalen on the 9th of March 2013.