Name the common alma mater of the Henry Morton Dexter and Jack McGregor.
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Henry_Morton_Dexter> <http://dbpedia.org/ontology/education> ?uri. <http://dbpedia.org/resource/Jack_McGregor> <http://dbpedia.org/ontology/education> ?uri . }
Henry_Morton_Dexter Jack_McGregor