user
Instruction
Answer the question based on the provided table.


Table
Table Title: nfl statistics
Table Content:
<table border="1" cellspacing="0">
<tr> <td rowspan="2"> year </td> <td rowspan="2"> team </td> <td> none </td> <td colspan="5"> rushing </td> <td colspan="5"> receiving </td> </tr>
<tr> <td> gp </td> <td> att </td> <td> yds </td> <td> avg </td> <td> lng </td> <td> td </td> <td> rec </td> <td> yds </td> <td> avg </td> <td> lng </td> <td> td </td> </tr>
<tr> <td> 1987 </td> <td> rai </td> <td> 7 </td> <td> 81 </td> <td> 554 </td> <td> 6.8 </td> <td> 91 </td> <td> 4 </td> <td> 16 </td> <td> 136 </td> <td> 8.5 </td> <td> 23 </td> <td> 2 </td> </tr>
<tr> <td> 1988 </td> <td> rai </td> <td> 10 </td> <td> 136 </td> <td> 580 </td> <td> 4.3 </td> <td> 25 </td> <td> 3 </td> <td> 9 </td> <td> 79 </td> <td> 8.8 </td> <td> 27 </td> <td> 0 </td> </tr>
<tr> <td> 1989 </td> <td> rai </td> <td> 11 </td> <td> 173 </td> <td> 950 </td> <td> 5.5 </td> <td> 92 </td> <td> 4 </td> <td> 9 </td> <td> 69 </td> <td> 7.7 </td> <td> 20 </td> <td> 0 </td> </tr>
<tr> <td> 1990 </td> <td> rai </td> <td> 10 </td> <td> 125 </td> <td> 698 </td> <td> 5.6 </td> <td> 88 </td> <td> 5 </td> <td> 6 </td> <td> 68 </td> <td> 11.3 </td> <td> 18 </td> <td> 0 </td> </tr>
<tr> <td colspan="2"> totals </td> <td> 38 </td> <td> 515 </td> <td> 2,782 </td> <td> 5.4 </td> <td> 92 </td> <td> 16 </td> <td> 40 </td> <td> 352 </td> <td> 9.1 </td> <td> 27 </td> <td> 2 </td> </tr>
</table>


Question
how many rushing yards did jackson get in four seasons totally.


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["2782.0"]