what is the {statement is subject of} for {Iowa} has {nickname} as {The Hawkeye State} ?
Is Iowa known as the Hawkeye State?
Does Iowa have the nickname the Hawkeye State?
SELECT ?y WHERE { ?o property:statement_is_subject_of ?y . resource:Iowa property:nickname ?o . ?o property:nickname ?g . FILTER ( CONTAINS ( ?g , 'The Hawkeye State' ) ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1546> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1449> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <The Hawkeye State> .
?statement <http://www.wikidata.org/entity/P805> ?value. 
} 

SELECT ?value WHERE { wd:Q1546 p:P1449 ?s . ?s ps:P1449 ?x filter(contains(?x , 'The Hawkeye State')) . ?s pq:P805 ?value}