How many {approved by} are for {Iraq War} ?
How many people are there that approved of the Iraq War?
How many are approved for the Iraq War?
SELECT ( COUNT ( ?z ) AS ?w ) { resource:Iraq_War property:approved_by ?z }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q545449> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P790> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q545449 wdt:P790 ?obj }
8