PREFIX dbpedia-owl: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX claylab: <http://www.example.no/claylab/>
PREFIX age: <http://example.no/claylab/employed_persons/Age/>

SELECT (SUM(?Number) AS ?TotalNumber) WHERE {

?measure dbpedia-owl:gender ?gender .
?measure dbpedia-owl:gender "female" .
?measure claylab:Number ?Number .
?measure claylab:involvedIn ?involvedIn .
?measure claylab:involvedIn "01-03 Agriculture, forestry and fishing" .
?measure age:min ?min .
?measure age:max ?max .

FILTER (?min >= 20 && ?max <= 24) .
}