what is the {start time} for {Cornelis Drebbel} has {work location} as {Haarlem} ?
The start time of Cornelis Drebbel, when working in Harlem, is when?
What start time does Cornelis Drebbel have for working in Haarlem?
SELECT ?v WHERE { ?l property:start_time ?v . resource:Cornelis_Drebbel property:work_location ?l . ?l property:work_location resource:Haarlem }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q365463> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P937> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q9920> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q365463 p:P937 ?s . ?s ps:P937 wd:Q9920 . ?s pq:P580 ?value}