Question: Did Umkhonto we Sizwe had Nelson Mandela as a commander?
SPARQL query: ASK WHERE { <http://dbpedia.org/resource/Umkhonto_we_Sizwe> <http://dbpedia.org/property/notableCommanders> <http://dbpedia.org/resource/Nelson_Mandela> }
Answer: [Yes], Nelson Mandela was the commander of Umkhonto we Sizwe.