Question: Was A foreign policy on freedom covered by John Trumbull?
SPARQL query: ASK WHERE { <http://dbpedia.org/resource/A_Foreign_Policy_of_Freedom> <http://dbpedia.org/property/coverArtist> <http://dbpedia.org/resource/John_Trumbull> }
Answer: [Yes], John Trumbull is the cover artist of A Foreign Policy of Freedom.