user
Instruction
Answer the question based on the provided table.


Table
Table Title: Speed skating at the 2006 Winter Olympics – Men's 1000 metres
Table Content:
| Rank | Pair | Name | Country | Time | Time behind |
| --- | --- | --- | --- | --- | --- |
|  | 19 | Shani Davis | United States | 1:08.89 |  |
|  | 20 | Joey Cheek | United States | 1:09.16 | +0.27 |
|  | 21 | Erben Wennemars | Netherlands | 1:09.32 | +0.43 |
| 4 | 20 | Lee Kyou-hyuk | South Korea | 1:09.37 | +0.48 |
| 5 | 21 | Jan Bos | Netherlands | 1:09.42 | +0.53 |
| 6 | 4 | Chad Hedrick | United States | 1:09.45 | +0.56 |
| 7 | 16 | Yevgeny Lalenkov | Russia | 1:09.46 | +0.57 |
| 8 | 18 | Stefan Groothuis | Netherlands | 1:09.57 | +0.68 |
| 9 | 18 | Casey FitzRandolph | United States | 1:09.59 | +0.70 |
| 10 | 6 | Dmitry Dorofeyev | Russia | 1:09.74 | +0.85 |
| 11 | 19 | Jeremy Wotherspoon | Canada | 1:09.76 | +0.87 |
| 12 | 9 | Beorn Nijenhuis | Netherlands | 1:09.85 | +0.96 |
| 13 | 4 | Konrad Niedźwiedzki | Poland | 1:09.95 | +1.06 |
| 14 | 16 | Mikael Flygind Larsen | Norway | 1:10.13 | +1.24 |
| 15 | 13 | Alexey Proshin | Russia | 1:10.14 | +1.25 |
| 16 | 7 | François-Olivier Roberge | Canada | 1:10.20 | +1.31 |
| 17 | 11 | Choi Jae-bong | South Korea | 1:10.23 | +1.34 |
| 18 | 12 | Petter Andersen | Norway | 1:10.38 | +1.38 |
| 19 | 17 | Denny Morrison | Canada | 1:10.44 | +1.44 |
| 20 | 15 | Yusuke Imai | Japan | 1:10.48 | +1.59 |
| 21 | 15 | Aleksandr Kibalko | Russia | 1:10.50 | +1.61 |
| 22 | 10 | Lee Kang-seok | South Korea | 1:10.52 | +1.63 |
| 23 | 14 | Even Wetten | Norway | 1:10.57 | +1.68 |
| 24 | 17 | Mun Jun | South Korea | 1:10.66 | +1.77 |
| 25 | 10 | Janne Hänninen | Finland | 1:10.83 | +1.94 |
| 26 | 2 | Mika Poutala | Finland | 1:11.03 | +2.14 |
| 27 | 14 | Takaharu Nakajima | Japan | 1:11.10 | +2.21 |
| 28 | 3 | Takahiro Ushiyama | Japan | 1:11.21 | +2.32 |
| 29 | 12 | Steven Elm | Canada | 1:11.36 | +2.47 |
| 30 | 8 | Maurizio Carnino | Italy | 1:11.44 | +2.55 |
| 31 | 1 | Pekka Koskela | Finland | 1:11.45 | +2.56 |
| 32 | 1 | Keiichiro Nagashima | Japan | 1:11.78 | +2.89 |
| 33 | 1 | An Weijiang | China | 1:11.80 | +2.91 |
| 34 | 1 | Yu Fengtong | China | 1:11.90 | +3.01 |
| 35 | 7 | Zhang Zhongqi | China | 1:12.29 | +3.40 |
| 36 | 8 | Aleksandr Zhigin | Kazakhstan | 1:12.36 | +3.47 |
| 37 | 9 | Risto Rosendahl | Finland | 1:12.60 | +3.71 |
| 38 | 5 | Lu Zhuo | China | 1:12.69 | +3.80 |
| – | 5 | Maciej Ustynowicz | Poland | DQ | – |
| – | 2 | Ermanno Ioriatti | Italy | DQ | – |
| – | 6 | Erik Zachrisson | Sweden | DQ | – |


Question
what is the number of contestants from the united states?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["4"]