[PAR] [TLE] Leonora Anson, Countess of Lichfield [SEP] Leonora, Countess of Lichfield, LVO (born 1 February 1949) was born as Leonora Mary Grosvenor, a daughter of the 5th Duke of Westminster. [PAR] [TLE] Robert Grosvenor, 5th Duke of Westminster [SEP] Lieutenant-Colonel Robert George Grosvenor, 5th Duke of Westminster, {'1': ", '2': ", '3': ", '4': "} (24 April 1910 – 19 February 1979) was a British soldier, landowner, businessman and politician.  In the 1970s he was the richest man in Britain.
[PAR] [TLE] Leonora Anson , Countess of Lichfield [ SEP ] Leonora , Countess of Lichfield , LVO ( born 1 February 1949 ) was born as Leonora Mary Grosvenor , a daughter of the 5th Duke of Westminster . [PAR] [TLE] Robert Grosvenor , 5th Duke of Westminster [ SEP ] Lieutenant - Colonel Robert George Grosvenor , 5th Duke of Westminster , { ' 1 ' : " , ' 2 ' : " , ' 3 ' : " , ' 4 ' : " } ( 24 April 1910 – 19 February 1979 ) was a British soldier , landowner , businessman and politician . In the 1970s he was the richest man in Britain .
Leonora Mary Grosvenor's father was the richest man in Britain in what decade?
Leonora Mary Grosvenor 's father was the richest man in Britain in what decade ?
1970s
1970s