How many {has facet polytope} are to/by {equilateral triangle} ?
How many facet polytopes does an equilateral triangle contain?
How many facet polytopes are in an equilateral triangle?
SELECT ( COUNT ( ?r ) AS ?l ) { ?r property:has_facet_polytope resource:equilateral_triangle }
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/P1312> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q157002 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P1312 wd:Q157002 }
217