What is {start time} of {Iron Age} that is {applies to part} is {Greece} ?
In Greece the Iron Age started in what year?
When did the Iron Age start in Greece?
SELECT ?f WHERE { ?i property:applies_to_part resource:Greece . ?i property:start_time ?f . resource:Iron_Age property:start_time ?i }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q11764> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P580> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P518> <http://wikidata.dbpedia.org/resource/Q41>
} 

SELECT ?obj WHERE { wd:Q11764 p:P580 ?s . ?s ps:P580 ?obj . ?s pq:P518 wd:Q41 }