How many {dedicated to} are to/by {Christopher Columbus} ?
How many is Christopher Columbus dedicated to?
Christopher Columbus is dedicated to how many?
SELECT ( COUNT ( ?x ) AS ?q ) { ?x property:dedicated_to resource:Christopher_Columbus }
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/P825> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q7322 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P825 wd:Q7322 }
14