Question: Name the river whose source is located in Itasca State Park and mouth is located in Pilottown, Louisiana?
SPARQL query: SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/sourceLocation> <http://dbpedia.org/resource/Itasca_State_Park> . ?uri <http://dbpedia.org/property/mouthLocation> <http://dbpedia.org/resource/Pilottown,_Louisiana>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/River>}
Answer: [Mississippi River] is the river with source location in Itasca State Park and mouth in Pilottown, Louisiana.