Paul Mauffray
He has also worked as assistant conductor on operas at the Salzburg Festival , Theater an der Wien , and was a guest conductor at the Romanian National Opera , Bucharest , Schleswig-Holsteinisches Landestheater , Slovak National Theater ( Bratislava , Slovakia ) , Opéra Louisiane , Mobile Opera Alabama , and the Mariinsky Theatre in Saint Petersburg , Russia . 
<triplet> Mariinsky Theatre <subj> Saint Petersburg <obj> located in the administrative territorial entity <subj> Russia <obj> country <triplet> Saint Petersburg <subj> Russia <obj> country <triplet> Russia <subj> Saint Petersburg <obj> contains administrative territorial entity