Question: List the opponents of the relatives of Thomas Helwys?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/relation> <http://dbpedia.org/resource/Thomas_Helwys> . ?x <http://dbpedia.org/ontology/opponent> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Person>}