what is the {start time} for {Berenice Abbott} has {educated at} as {Ohio State University} ?
When did Berenice Abbott attend Ohio State University?
When did Berenice Abbott begin her studies at Ohio State University?
SELECT ?k WHERE { ?o property:start_time ?k . ?o property:educated_at resource:Ohio_State_University . resource:Berenice_Abbott property:educated_at ?o }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q231861> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P69> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q309331> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q231861 p:P69 ?s . ?s ps:P69 wd:Q309331 . ?s pq:P580 ?value}