user
Instruction
Answer the question based on the provided table.


Table
Table Title: Sport in Australia
Table Content:
| Competition | Total spectatorship | Average match attendance | Year |
| --- | --- | --- | --- |
| A-League | 1,772,133 | 12,707 | 2012/2013 |
| Australian Football League | 6,931,085 | 33,484 | 2013 |
| Big Bash League | 550,262 | 17,750 | 2011/2012 |
| National Basketball League | 547,021 | 4,031 | 2010/2011 |
| National Rugby League | 3,345,248 | 16,643 | 2013 |
| Super Rugby | 773,940 | 19,348 | 2012 |
| Rugby Championship | 133,532 | 44,511 | 2012 |
| State of Origin series | 186,607 | 62,202 | 2011 |
| Women's National Basketball League | 77,944 |  | 2010/2011 |


Question
what is the only sport that has a listed average match attendance of less than 10,000?


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