Question: Under which king did the British prime minister that signed the Munich agreement serve?
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX yago: <http://dbpedia.org/class/yago/>
SELECT DISTINCT ?uri 
WHERE {
        ?x rdf:type yago:PrimeMinistersOfTheUnitedKingdom .
        ?x text:"sign" text:"Munich Agreement" .
        ?x dbo:monarch ?uri .
}