Which educational institution of Jack Mcgregor is also the alma mater of Donn barber?
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Jack_McGregor> <http://dbpedia.org/ontology/education> ?uri. <http://dbpedia.org/resource/Donn_Barber> <http://dbpedia.org/ontology/education> ?uri . }
Jack_McGregor Donn_Barber