What is {occupation} of {Bernard Bolzano} that is {start time} is {1805-4-7} ?
Where did Bernard Bolzano work on 1805-4-7?
What job did Bernard Bolzano have on 1805-4-7?
SELECT ?z WHERE { resource:Bernard_Bolzano property:occupation ?b . ?b property:occupation ?z . ?b property:start_time ?z . FILTER ( CONTAINS ( YEAR ( ?z ) , '1805' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q184735> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P106> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1805-4-7>
} 

SELECT ?obj WHERE { wd:Q184735 p:P106 ?s . ?s ps:P106 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1805')) }