How many {item operated} are to/by {Airbus A380} ?
What does AirbusA380 operate and how many are included?
How many items are operated by the Airbus A380?
SELECT ( COUNT ( ?b ) AS ?u ) { ?b property:item_operated resource:Airbus_A380 }
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/P121> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q5830 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P121 wd:Q5830 }
17