user
Instruction
Answer the question based on the provided table.


Table
Table Title: Masters M40 100 metres world record progression
Table Content:
| Hand | Auto | Wind | Athlete | Nationality | Birthdate | Location | Date |
| --- | --- | --- | --- | --- | --- | --- | --- |
|  | 10.26 | 2.3 | Troy Douglas | Netherlands | 30.11.1962 | Utrecht | 10.07.2004 |
|  | 10.29 | 1.9 | Troy Douglas | Netherlands | 30.11.1962 | Leiden | 07.06.2003 |
|  | 10.60 |  | Bill Collins | United States | 20.11.1950 |  | 06.06.1992 |
|  | 10.84 | 1.8 | Erik Oostweegel | Netherlands | 29.04.1960 | Tilburg | 10.06.2000 |
|  | 10.87 |  | Eddie Hart | United States | 24.04.1949 | Eugene | 03.08.1989 |
|  | 10.90 |  | Thaddeus Bell | United States | 28.11.1942 | Raleigh | 01.05.1988 |
|  | 10.93 | 0.6 | Gilles Echevin | France | 01.09.1948 | Grenoble | 07.05.1989 |
| 10.7 |  |  | Klaus Jürgen Schneider | Germany | 02.03.1942 | Stuttgart | 07.07.1982 |
| 10.7 |  |  | Walt Butler | United States | 21.03.1941 | Northridge | 16.05.1981 |
| 10.7 |  |  | Thane Baker | United States | 04.10.1931 | Elkhart | 13.09.1972 |
|  | 10.95 |  | George McNeill | United Kingdom | 19.02.1947 | Melbourne | 31.11.1987 |
|  | 10.95 |  | Karl Heinz Schröder | Germany | 17.06.1939 | Hannover | 28.07.1979 |


Question
which nationality has the most athletes?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["United States"]