How many {license} are for {PLoS ONE} ?
How many license plate numbers contain +1?
How many license plates have "plus one" or "+one"?
SELECT ( COUNT ( ?t ) AS ?y ) { resource:PLOS_ONE property:copyright_license ?t }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q564954> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P275> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q564954 wdt:P275 ?obj }
4