Did {Robert_E._Lee} {cause of death} {chronic obstructive pulmonary disease}?
Did Robert E. Lee die of COPD?
Was chronic obstructive pulmonary disease the death cause of Robert E.Lee?
ASK WHERE { resource:Robert_E._Lee property:cause_of_death resource:Chronic_obstructive_pulmonary_disease }
 ASK { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q165557> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P509> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q199804>. } 
ASK WHERE { wd:Q165557 wdt:P509 wd:Q199804 }