How many {superhuman feature or ability} are for {Superman} ?
Did superman have  many superpowers?
How many superpowers does Superman have?
SELECT ( COUNT ( ?i ) AS ?j ) { resource:Superman property:superhuman_feature_or_ability ?i }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q79015> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2563> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q79015 wdt:P2563 ?obj }
16