What is {employer} of {Joseph Liouville} and {start time}
Who is Joseph Liouville's boss and what is his begin time?
Who is Joseph Liouville's employer and what is his start time?
SELECT ?i ?p WHERE { resource:Joseph_Liouville property:employer ?q . ?q property:employer ?p . ?q property:start_time ?i . }
select distinct ?dataprop1 ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q214549> . ?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> ?obj . ?statement <http://www.wikidata.org/entity/P580> ?dataprop1 . } 
SELECT ?value1 ?obj WHERE { wd:Q214549 p:P108 ?s . ?s ps:P108 ?obj . ?s pq:P580 ?value1 . }