How many {has attribute} are for {Athena} ?
What is the number that has the attribute for Athena?
How many have the attribute for the {Athena} ?
SELECT ( COUNT ( ?y ) AS ?o ) { resource:Athena property:iconographic_symbol ?y }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q37122> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4185> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q37122 wdt:P4185 ?obj }
5