user
Instruction
Answer the question based on the provided table.


Table
Table Title: Men's 200 metres world record progression
Table Content:
| Time | Wind | Auto | Athlete | Nationality | Location of race | Date |
| --- | --- | --- | --- | --- | --- | --- |
| 20.6y |  |  | Andy Stanfield | United States | Philadelphia, United States | May 26, 1951 |
| 20.6 |  |  | Andy Stanfield | United States | Los Angeles, United States | June 28, 1952 |
| 20.6 | 0.0 |  | Thane Baker | United States | Bakersfield, United States | June 23, 1956 |
| 20.6 |  | 20.75 | Bobby Morrow | United States | Melbourne, Australia | November 27, 1956 |
| 20.6 |  |  | Manfred Germar | West Germany | Wuppertal, Germany | October 1, 1958 |
| 20.6y | −1.6 |  | Ray Norton | United States | Berkeley, United States | March 19, 1960 |
| 20.6 |  |  | Ray Norton | United States | Philadelphia, United States | April 30, 1960 |
| 20.5y |  |  | Peter Radford | United Kingdom | Wolverhampton, United Kingdom | May 28, 1960 |
| 20.5 | 0.0 | 20.75 | Stone Johnson | United States | Stanford, United States | July 2, 1960 |
| 20.5 | 0.0 |  | Ray Norton | United States | Stanford, United States | July 2, 1960 |
| 20.5 |  | 20.65 | Livio Berruti | Italy | Rome, Italy | September 3, 1960 |
| 20.5 |  | 20.62 | Livio Berruti | Italy | Rome, Italy | September 3, 1960 |
| 20.5y | −1.1 | 20.67 | Paul Drayton | United States | Walnut, United States | June 23, 1962 |
| 20.3y | −0.1 |  | Henry Carr | United States | Tempe, United States | March 23, 1963 |
| 20.2y | 0.5 |  | Henry Carr | United States | Tempe, United States | April 4, 1964 |
| 20.0y | 0.0 |  | Tommie Smith | United States | Sacramento, United States | June 11, 1968 |
| 19.8A | 0.9 | 19.83A | Tommie Smith | United States | Mexico City, Mexico | October 16, 1968 |
| 19.8A | 0.9 | 19.86A | Donald Quarrie | Jamaica | Cali, Colombia | August 3, 1971 |
| 19.8+ | 1.3 |  | Donald Quarrie | Jamaica | Eugene, Oregon, United States | June 7, 1975 |


Question
in what year was bobby morrow's only win?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["1956"]