Question: Why did Letita McTavish Hargrave and Sextus Barbour die?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { res:Letitia_MacTavish_Hargrave onto:deathCause ?uri. res:Sextus_Barbour prop:deathCause ?uri}