Question: Which  institution of the Alton Ochsner is the alma mater of the Michael Hahn ?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { res:Alton_Ochsner onto:institution ?uri. res:Michael_Hahn onto:almaMater ?uri}