Question: Is Nikolai Morozov the former coach of Stanislav Morozov?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
ASK WHERE { <http://dbpedia.org/resource/Stanislav_Morozov> onto:formerCoach <http://dbpedia.org/resource/Nikolai_Morozov_(figure_skater)> }