Question: What disease led to the demise of Letitia MacTavish Hargrave and Martino Martini ?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Letitia_MacTavish_Hargrave> onto:deathCause ?uri. <http://dbpedia.org/resource/Martino_Martini> onto:deathCause ?uri . ?uri rdf:type onto:Disease}