How many {sport number} are for {Michael Jordan} ?
What jersey number did michael jordan play with?
what was michael jordans number?
SELECT ( COUNT ( ?v ) AS ?y ) { resource:Michael_Jordan property:sport_number ?v }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q41421> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1618> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q41421 wdt:P1618 ?obj }
4