Complex sentence: However, the song was live premiered on the opening show of the tour for the band's new album "Koloss" in Bristol, England on April 12th, 2012, and has been performed as the closing song for every show on the tour since then.
Split into simpler sentences: However, the song premiered live at the opening show of the "Koloss" tour in Bristol, England on April 12,2012. It was performed as the closing song for every show on the tour since then.