How many {employer} are to/by {Nissan} ?
Give the name of the employer at Nissan.
Who's the employer's at Nissan?
SELECT ( COUNT ( ?b ) AS ?u ) { ?b property:employer resource:Nissan }
SELECT (COUNT(?sub) AS ?subs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sub .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P108> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q20165 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P108 wd:Q20165 }
15