How many {country of origin} are for {thrash metal} ?
What country did thrash metal originate in?
What is the country of origin for thrash metal?
SELECT ( COUNT ( ?s ) AS ?j ) { resource:thrash_metal property:country_of_origin ?s }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q483352> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P495> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q483352 wdt:P495 ?obj }
4