How many {therapeutic area} are to/by {breast cancer} ?
There are how many therapeutic areas related to breast cancer?
SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P4044 wd:Q128581 }
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/P4044> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q128581 .
} 

Which is the number of the therapeutic areas related to breast cancer?