what is the {start time} for {Nadia Boulanger} has {employer} as {Fontainebleau Schools} ?
When did Nadia Boulanger begin working at Fontainebleau Schools?
When did Nadia Boulanger start working at Fontainebleau Schools?
SELECT ?n WHERE { ?a property:start_time ?n . resource:Nadia_Boulanger property:employer ?a . ?a property:employer resource:Fontainebleau_Schools }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q140619> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P108> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q470082> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q140619 p:P108 ?s . ?s ps:P108 wd:Q470082 . ?s pq:P580 ?value}