what is the {determination method} for {Ferrara} has {population} as {132009} ?
How was Ferrara's population determined to be 132009?
What was the method used to determine the population of Ferrara was 132009?
SELECT ?c WHERE { ?n property:determination_method ?c . resource:Ferrara property:population ?n . ?n property:population ?p . FILTER ( CONTAINS ( ?p , '132009' ) ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q13362> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1082> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <132009> .
?statement <http://www.wikidata.org/entity/P459> ?value. 
} 

SELECT ?value WHERE { wd:Q13362 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '132009')) . ?s pq:P459 ?value}