Complex sentence: Early 2008 it was surprisingly announced that Seigmen would play live yet again at Oslo Opera House June 21 the same year as one of the shows celebrating of the opening of the new Opera House in Oslo.
Split into simpler sentences: Early 2008 it was surprisingly announced that Seigmen would yet again play live. The performance was at the Oslo Opera House on June 21 of the same year as one of the shows celebrating the opening of the new Opera House in Oslo.