What is {head coach} of {Arsenal F.C.} that is {start time} is {2018-5-22} ?
On May 22, 2018, who served as the Arsenal F.C. head coach?
Who was the head coach of Arsenal F.C. as of May 22, 2018?
SELECT ?o WHERE { ?o property:start_time ?v . resource:Arsenal_F.C. property:head_coach ?o . FILTER ( CONTAINS ( YEAR ( ?v ) , '2018' ) ) . ?o property:head_coach ?o }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q9617> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P286> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <2018-5-22>
} 

SELECT ?obj WHERE { wd:Q9617 p:P286 ?s . ?s ps:P286 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2018')) }