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