Question: What killed John Thompson Mason and Martino Martini?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/John_Thomson_Mason_(1787–1850)> onto:deathCause ?uri. <http://dbpedia.org/resource/Martino_Martini> onto:deathCause ?uri . }