Question: What is the alma mater of the author of Letter to a Christian Nation?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { res:Letter_to_a_Christian_Nation onto:author ?x . ?x prop:almaMater ?uri . }