Complex sentence: He participated in Melodifestivalen 2017 with the song "I Can't Go On" and won the competition, giving him the right to representing Sweden in the Eurovision Song Contest 2017 in Kiev.
Split into simpler sentences: He participated in Melodifestivalen 2017 with the song "I Can't Go On" and won the competition. He will represent Sweden in the Eurovision Song Contest 2017 in Kiev.