Task: Data-Imputation (source dataset: tablib)

Please fill in the missing value in the input table. The missing value is denoted by '[MISSING]'. Please only return the value filled in. Do not return the whole table.

No explanation, return the value filled in JSON format: {"value": "filled_value"}. 

Input Table:
| First name   | Last name   | Position                      | Office        |   Age | Start date   | Salary     | Extn.     | E-mail                       |
|:-------------|:------------|:------------------------------|:--------------|------:|:-------------|:-----------|:----------|:-----------------------------|
| Tiger        | Nixon       | System Architect              | Edinburgh     |    61 | 2011/04/25   | $320,800   | 5421      | t.nixon@datatables.net       |
| Garrett      | Winters     | Accountant                    | Tokyo         |    63 | 2011/07/25   | $170,750   | 8422      | g.winters@datatables.net     |
| Ashton       | Cox         | Junior Technical Author       | San Francisco |    66 | 2009/01/12   | $86,000    | 1562      | a.cox@datatables.net         |
| Cedric       | Kelly       | Senior Javascript Developer   | Edinburgh     |    22 | 2012/03/29   | $433,060   | 6224      | c.kelly@datatables.net       |
| Airi         | Satou       | Accountant                    | Tokyo         |    33 | 2008/11/28   | $162,700   | 5407      | a.satou@datatables.net       |
| Brielle      | Williamson  | Integration Specialist        | New York      |    61 | 2012/12/02   | $372,000   | 4804      | b.williamson@datatables.net  |
| Herrod       | Chandler    | Sales Assistant               | San Francisco |    59 | 2012/08/06   | $137,500   | 9608      | h.chandler@datatables.net    |
| Rhona        | Davidson    | Integration Specialist        | Tokyo         |    55 | 2010/10/14   | $327,900   | 6200      | r.davidson@datatables.net    |
| Colleen      | Hurst       | Javascript Developer          | San Francisco |    39 | 2009/09/15   | $205,500   | 2360      | c.hurst@datatables.net       |
| Sonya        | Frost       | Software Engineer             | Edinburgh     |    23 | 2008/12/13   | $103,600   | 1667      | s.frost@datatables.net       |
| Jena         | Gaines      | Office Manager                | London        |    30 | 2008/12/19   | $90,560    | 3814      | j.gaines@datatables.net      |
| Quinn        | Flynn       | Support Lead                  | Edinburgh     |    22 | 2013/03/03   | $342,000   | 9497      | q.flynn@datatables.net       |
| Charde       | Marshall    | Regional Director             | San Francisco |    36 | 2008/10/16   | $470,600   | 6741      | c.marshall@datatables.net    |
| Haley        | Kennedy     | Senior Marketing Designer     | London        |    43 | 2012/12/18   | $313,500   | 3597      | h.kennedy@datatables.net     |
| Tatyana      | Fitzpatrick | Regional Director             | London        |    19 | 2010/03/17   | $385,750   | 1965      | t.fitzpatrick@datatables.net |
| Michael      | Silva       | Marketing Designer            | London        |    66 | 2012/11/27   | $198,500   | 1581      | m.silva@datatables.net       |
| Paul         | Byrd        | Chief Financial Officer (CFO) | New York      |    64 | 2010/06/09   | $725,000   | 3059      | p.byrd@datatables.net        |
| Gloria       | Little      | Systems Administrator         | New York      |    59 | 2009/04/10   | $237,500   | 1721      | g.little@datatables.net      |
| Bradley      | Greer       | Software Engineer             | London        |    41 | 2012/10/13   | $132,000   | 2558      | b.greer@datatables.net       |
| Dai          | Rios        | Personnel Lead                | Edinburgh     |    35 | 2012/09/26   | $217,500   | 2290      | d.rios@datatables.net        |
| Jenette      | Caldwell    | Development Lead              | New York      |    30 | 2011/09/03   | $345,000   | 1937      | j.caldwell@datatables.net    |
| Yuri         | Berry       | Chief Marketing Officer (CMO) | New York      |    40 | 2009/06/25   | $675,000   | 6154      | y.berry@datatables.net       |
| Caesar       | Vance       | Pre-Sales Support             | New York      |    21 | 2011/12/12   | $106,450   | 8330      | c.vance@datatables.net       |
| Doris        | Wilder      | Sales Assistant               | Sidney        |    23 | 2010/09/20   | $85,600    | 3023      | d.wilder@datatables.net      |
| Angelica     | Ramos       | Chief Executive Officer (CEO) | London        |    47 | 2009/10/09   | $1,200,000 | 5797      | a.ramos@datatables.net       |
| Gavin        | Joyce       | Developer                     | Edinburgh     |    42 | 2010/12/22   | $92,575    | 8822      | g.joyce@datatables.net       |
| Jennifer     | Chang       | Regional Director             | Singapore     |    28 | 2010/11/14   | $357,650   | 9239      | j.chang@datatables.net       |
| Brenden      | Wagner      | Software Engineer             | San Francisco |    28 | 2011/06/07   | $206,850   | 1314      | b.wagner@datatables.net      |
| Fiona        | Green       | Chief Operating Officer (COO) | San Francisco |    48 | 2010/03/11   | $850,000   | 2947      | f.green@datatables.net       |
| Shou         | Itou        | Regional Marketing            | Tokyo         |    20 | 2011/08/14   | $163,000   | 8899      | s.itou@datatables.net        |
| Michelle     | House       | Integration Specialist        | Sidney        |    37 | 2011/06/02   | $95,400    | 2769      | m.house@datatables.net       |
| Suki         | Burks       | Developer                     | London        |    53 | 2009/10/22   | $114,500   | 6832      | s.burks@datatables.net       |
| Prescott     | Bartlett    | Technical Author              | London        |    27 | 2011/05/07   | $145,000   | 3606      | p.bartlett@datatables.net    |
| Gavin        | Cortez      | Team Leader                   | San Francisco |    22 | 2008/10/26   | $235,500   | 2860      | g.cortez@datatables.net      |
| Martena      | Mccray      | Post-Sales support            | Edinburgh     |    46 | 2011/03/09   | $324,050   | 8240      | m.mccray@datatables.net      |
| Unity        | Butler      | Marketing Designer            | San Francisco |    47 | 2009/12/09   | $85,675    | 5384      | u.butler@datatables.net      |
| Howard       | Hatfield    | Office Manager                | San Francisco |    51 | 2008/12/16   | $164,500   | 7031      | h.hatfield@datatables.net    |
| Hope         | Fuentes     | Secretary                     | San Francisco |    41 | 2010/02/12   | $109,850   | 6318      | h.fuentes@datatables.net     |
| Vivian       | Harrell     | Financial Controller          | San Francisco |    62 | 2009/02/14   | $452,500   | 9422      | v.harrell@datatables.net     |
| Timothy      | Mooney      | Office Manager                | London        |    37 | 2008/12/11   | $136,200   | 7580      | t.mooney@datatables.net      |
| Jackson      | Bradshaw    | Director                      | New York      |    65 | 2008/09/26   | $645,750   | 1042      | j.bradshaw@datatables.net    |
| Olivia       | Liang       | Support Engineer              | Singapore     |    64 | 2011/02/03   | $234,500   | 2120      | o.liang@datatables.net       |
| Bruno        | Nash        | Software Engineer             | London        |    38 | 2011/05/03   | $163,500   | 6222      | b.nash@datatables.net        |
| Sakura       | Yamamoto    | Support Engineer              | Tokyo         |    37 | 2009/08/19   | $139,575   | 9383      | s.yamamoto@datatables.net    |
| Thor         | Walton      | Developer                     | New York      |    61 | 2013/08/11   | $98,540    | 8327      | t.walton@datatables.net      |
| Finn         | Camacho     | Support Engineer              | San Francisco |    47 | 2009/07/07   | $87,500    | 2927      | f.camacho@datatables.net     |
| Serge        | Baldwin     | Data Coordinator              | Singapore     |    64 | 2012/04/09   | $138,575   | 8352      | s.baldwin@datatables.net     |
| Zenaida      | Frank       | Software Engineer             | New York      |    63 | 2010/01/04   | $125,250   | 7439      | z.frank@datatables.net       |
| Zorita       | Serrano     | Software Engineer             | San Francisco |    56 | 2012/06/01   | $115,000   | [MISSING] | z.serrano@datatables.net     |
| Jennifer     | Acosta      | Junior Javascript Developer   | Edinburgh     |    43 | 2013/02/01   | $75,650    | 3431      | j.acosta@datatables.net      |
| Cara         | Stevens     | Sales Assistant               | New York      |    46 | 2011/12/06   | $145,600   | 3990      | c.stevens@datatables.net     |
| Hermione     | Butler      | Regional Director             | London        |    47 | 2011/03/21   | $356,250   | 1016      | h.butler@datatables.net      |
| Lael         | Greer       | Systems Administrator         | London        |    21 | 2009/02/27   | $103,500   | 6733      | l.greer@datatables.net       |
| Jonas        | Alexander   | Developer                     | San Francisco |    30 | 2010/07/14   | $86,500    | 8196      | j.alexander@datatables.net   |
| Shad         | Decker      | Regional Director             | Edinburgh     |    51 | 2008/11/13   | $183,000   | 6373      | s.decker@datatables.net      |
| Michael      | Bruce       | Javascript Developer          | Singapore     |    29 | 2011/06/27   | $183,000   | 5384      | m.bruce@datatables.net       |
| Donna        | Snider      | Customer Support              | New York      |    27 | 2011/01/25   | $112,000   | 4226      | d.snider@datatables.net      |



row_idx: 48
col_idx: 7
col_name: Extn.
label: 4389
output: value: 4389
tablib_key: tables/job=github_000005/batch=008354/L0HNDuvx1jJERJQOAZLl1SOZEoT7yfRy3k-2W4bhSis=