Original: Sir John Major , KG , CH , ACIB ( born 29 March 1943 ) is a British politician , who served as Prime Minister of the United Kingdom and Leader of the Conservative Party from 1990 to 1997 .
Simplified: Sir John Major ( born March 29 , 1943 ) KG , CH is a British politician who was Prime Minister of the United Kingdom from 1990 to 1997 .