Question: Who is the writer of the Cavalcade of America and The United States Steel Hour ?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Cavalcade_of_America> <http://dbpedia.org/ontology/writer> ?uri. <http://dbpedia.org/resource/The_United_States_Steel_Hour> <http://dbpedia.org/ontology/writer> ?uri . }