Complex sentence: The song was written by Gerard James Borg and composed by, who also wrote Carola's entry in the Swedish Melodifestivalen 2006, Invincible (which became Sweden's Eurovision Song Contest 2006 entry).
Split into simpler sentences: The song was written by Gerard James Borg and composed by. G: son also wrote Carola's entry in the Swedish Melodifestivalen 2006, Invincible (which became Sweden's Eurovision Song Contest 2006 entry).