How many {highway system} are to/by {Interstate Highway System} ?
The Interstate Highway System contains what number of high way systems?
How many high ways systems are there in the  {Interstate Highway System} ?
SELECT ( COUNT ( ?x ) AS ?f ) { ?x property:highway_system resource:Interstate_Highway_System }
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/P16> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q94247 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P16 wd:Q94247 }
617