Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Birth year and age | Net worth US$ (billions) | Citizenship | Source |
| --- | --- | --- | --- | --- |
| Liliane Bettencourt | 1922/1923(age 90–91) | 30.0 | France | L'Oréal , inherited |
| Christy Walton | 1948/1949(age 64–65) | 28.8 | United States | Wal-Mart , inherited |
| Alice Walton | 1949/1950(age 63–64) | 26.3 | United States | Wal-Mart , inherited |
| Iris Fontbona & family | 1942/1943(age 70–71) | 17.4 | Chile | Antofagasta PLC , inherited |
| Jacqueline Mars | 1940/1941(age 72–73) | 17.8 | United States | Mars, Incorporated , inherited |
| Gina Rinehart | 1953/1954(age 59–60) | 17.0 | Australia | Hancock , inherited |
| Susanne Klatten | 1962/1963(age 50–51) | 14.3 | Germany | Altana , inherited |
| Abigail Johnson | 1961/1962(age 51–52) | 12.7 | United States | Fidelity Investments , inherited |
| Miuccia Prada | 1948/1949(age 64–65) | 12.4 | Italy | Prada , inherited |
| Anne Cox Chambers | 1919/1920(age 93–94) | 12.0 | United States | Cox Enterprises , inherited |
Question:
What's the source of wealth of the person worth $17 billion?
Answer:
Hancock , inherited