What is the  start time  for  Arthur Wellesley, 1st Duke of Wellington  as  Prime Minister of the United Kingdom ?
SELECT ?value WHERE { wd:Q131691 p:P39 ?s . ?s ps:P39 wd:Q14211 . ?s pq:P580 ?value}
arthur wellesley, 1st duke of wellington: Q131691 prime minister of the united kingdom: Q14211