In which year range did James Callaghan gained power as the Member of the 49th Parliament of the United Kingdom ?
SELECT ?value1 ?value2 WHERE { wd:Q9576 p:P39 ?s . ?s ps:P39 wd:Q41582621 . ?s pq:P2715 ?value1 . ?s pq:P1534 ?value2 }
james callaghan: Q9576 member of the 49th parliament of the united kingdom: Q41582621