what is the {quantity} for {The Carnival of the Animals} has {instrumentation} as {double bass} ?
What is the quantity of The Carnival of the Animals whose instrumentation is double bass?
SELECT ?value WHERE { wd:Q941724 p:P870 ?s . ?s ps:P870 wd:Q80019 . ?s pq:P1114 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q941724> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P870> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q80019> .
?statement <http://www.wikidata.org/entity/P1114> ?value. 
} 

Tell me the number of The Carnival of the Animals whose instrumentation is double bass.