Question: How many other home stadium are there of the soccer club whose home stadium is Luzhniki Stadium ?
SPARQL:
 SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/ontology/homeStadium> <http://dbpedia.org/resource/Luzhniki_Stadium> . ?x <http://dbpedia.org/ontology/homeStadium> ?uri }