How many {sibling} are for {Edward III of England} ?
What is the number of Siblings Edward III of England  has?
How many siblings did Edward III of England have?
SELECT ( COUNT ( ?b ) AS ?v ) { resource:Edward_III_of_England property:sibling ?b }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q129247> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3373> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q129247 wdt:P3373 ?obj }
4