How many {archives at} are for {Grace Hopper} ?
Out of the archives, which are for Grace Hopper?
How many of the archives are for Grace Hopper?
SELECT ( COUNT ( ?o ) AS ?v ) { resource:Grace_Hopper property:archives_at ?o }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q11641> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P485> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q11641 wdt:P485 ?obj }
4