Question: Which cover artist of the The Adventures of Tom Sawyer is also the source of inspiration of The Appple Tree ?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/The_Adventures_of_Tom_Sawyer> <http://dbpedia.org/ontology/coverArtist> ?uri. <http://dbpedia.org/resource/The_Apple_Tree> <http://dbpedia.org/ontology/basedOn> ?uri}
Answer: The cover artist of The Adventures of Tom Sawyer and source of inspiration of The Apple Tree is [Mark Twain].