Question: Which ship builder built the USS Camp and Sturtevant ?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/USS_Camp_(DE-251)> prop:shipBuilder ?uri. <http://dbpedia.org/resource/USS_Sturtevant_(DE-239)> prop:shipBuilder ?uri . }