Det sjungande trädet
... that the premiere of Erik Bergman's only full-length opera, Det sjungande trädet (The Singing Tree), was delayed for over a year because of its complex staging requirements?
... that the premiere of <a href="./Erik_Bergman" id="mwAgk" rel="mw:WikiLink" title="Erik Bergman">Erik Bergman</a>'s only full-length opera, <i id="mwAgo"><b id="mwAgs"><a href="./Det_sjungande_trädet_(opera)" id="mwAgw" rel="mw:WikiLink" title="Det sjungande trädet (opera)">Det sjungande trädet</a></b></i> (<i id="mwAg0">The Singing Tree</i>), was delayed for over a year because of its complex staging requirements?