How many {recorded at} are to/by {Hollywood} ?
How many recordings does Hollywood contain
How many recordings are there in the {Hollywood} ?
SELECT ( COUNT ( ?y ) AS ?x ) { ?y property:recorded_at_studio_or_venue resource:Hollywood }
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/P483> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q34006 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P483 wd:Q34006 }
5