What is the {human} for {notable work} of {Flatiron Building}
Who is the {human} for {outstanding work} of {Flatiron Building}
Who is the {human} for {notable work} of {Flatiron Building}
SELECT DISTINCT ?i WHERE { ?i property:notable_work resource:Flatiron_Building . ?i rdf:type ontology:human }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P800> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q220728> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q5> } 
 select distinct ?sbj where { ?sbj wdt:P800 wd:Q220728 . ?sbj wdt:P31 wd:Q5 } 
Daniel Burnham Frederick P. Dinkelberg