Question: Was the cover of The adventures of Tom Sawyer designed by Mark Twain?
SPARQL query: ASK WHERE { <http://dbpedia.org/resource/The_Adventures_of_Tom_Sawyer> <http://dbpedia.org/ontology/coverArtist> <http://dbpedia.org/resource/Mark_Twain> }
Answer: [Yes], Mark Twain was the cover artist of The Adventures of Tom Sawyer.