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