what is the {start time} for {Ngũgĩ wa Thiong'o} has {employer} as {University of Nairobi} ?
On what date did Ngugi wa Thiong'o start her job at the University of Nairobi?
When did Ngũgĩ wa Thiong'o begin working at the University of Nairobi?
SELECT ?z WHERE { ?y property:employer resource:University_of_Nairobi . resource:Ngugi_wa_Thiong’o property:employer ?y . ?y property:start_time ?z }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q302910> .
?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/Q649998> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q302910 p:P108 ?s . ?s ps:P108 wd:Q649998 . ?s pq:P580 ?value}