Paolo Padovani
... that, in 2004, Paolo Padovani and a team at the European Astrophysical Virtual Observatory (AVO) discovered 30 supermassive black holes which were previously obscured by dust clouds?
... that, in 2004, <b id="mwCUs"><a href="./Paolo_Padovani" id="mwCUw" rel="mw:WikiLink" title="Paolo Padovani">Paolo Padovani</a></b> and a team at the European Astrophysical Virtual Observatory (AVO) discovered 30 <a href="./Supermassive_black_hole" id="mwCU0" rel="mw:WikiLink" title="Supermassive black hole">supermassive black holes</a> which were previously obscured by dust clouds?