text: Sir John Major , ( born 29 March 1943 ) is a British Conservative politician , who served as Prime Minister of the United Kingdom and Leader of the Conservative Party from 1990 â `` 1997 .
simplified: Sir John Major ( born 29 March 1943 ) KG , CH is a British politician who was Prime Minister of the United Kingdom and leader of the Conservative Party from November 1990 to May 1997 .