What is {spouse} of {Thomas Piketty} that is {start time} is {2014-1-1} ?
With whom has Thomas Piketty been married since 2014?
Tell me the name of Thomas Piketty's spouse as of 2014?
SELECT ?r WHERE { resource:Thomas_Piketty property:spouse ?u . FILTER ( CONTAINS ( YEAR ( ?r ) , '2014' ) ) . ?u property:start_time ?r . ?u property:spouse ?r }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q984448> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <2014-1-1>
} 

SELECT ?obj WHERE { wd:Q984448 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2014')) }