How many {owner of} are for {Royal Dutch Shell} ?
How many own Royal Dutch Shell?
Royal Dutch Shell has how many owners of?
SELECT ( COUNT ( ?w ) AS ?n ) { resource:Royal_Dutch_Shell property:owner_of ?w }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q154950> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1830> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q154950 wdt:P1830 ?obj }
7