How many {cites} are to/by {A Mathematical Theory of Communication} ?
How many cities make up a mathematical theory of communication?
how many cites are in a mathematical theory of communication?
SELECT ( COUNT ( ?h ) AS ?c ) { ?h property:cites_work resource:A_Mathematical_Theory_of_Communication }
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/P2860> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q724029 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P2860 wd:Q724029 }
0