Question: In which common territory did Sino French war and the Tonkin campaign take place?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Sino-French_War> <http://dbpedia.org/ontology/territory> ?uri. <http://dbpedia.org/resource/Tonkin_Campaign> <http://dbpedia.org/ontology/territory> ?uri . }