what is the {start time} for {Adolph Marx} has {given name} as {Arthur} ?
From what time did the name Arthur come to be used by Adolph Marx?
When did Adolph Marx start using his given name Arthur?
SELECT ?h WHERE { resource:Harpo_Marx property:given_name ?t . ?t property:given_name resource:Arthur . ?t property:start_time ?h }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q317237> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P735> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q1778168> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q317237 p:P735 ?s . ?s ps:P735 wd:Q1778168 . ?s pq:P580 ?value}