Task: Data-Imputation (source dataset: WebTable)

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:
| Constituency/Region                                 | MSP                     | Party                       |   MSP Since | Office previously held                             |
|:----------------------------------------------------|:------------------------|:----------------------------|------------:|:---------------------------------------------------|
| Airdrie and Shotts                                  | Karen Whitefield        | Scottish Labour Party       |        1999 | nan                                                |
| Cumbernauld and Kilsyth                             | Cathie Craigie          | Scottish Labour Party       |        1999 | nan                                                |
| East Kilbride                                       | Andy Kerr               | Scottish Labour Party       |        1999 | Minister for Finance and Public Services           |
| Falkirk East                                        | Cathy Peattie           | Scottish Labour Party       |        1999 | nan                                                |
| Glasgow Anniesland                                  | Bill Butler             | Scottish Labour Party       |        2000 | nan                                                |
| Glasgow Cathcart                                    | Charlie Gordon          | Scottish Labour Party       |        2005 | nan                                                |
| Glasgow Kelvin                                      | Pauline McNeill         | Scottish Labour Party       |        1999 | nan                                                |
| Glasgow Shettleston                                 | Frank McAveety          | Scottish Labour Party       |        1999 | Minister for Tourism, Culture and Sport            |
| Kirkcaldy                                           | Marilyn Livingstone     | Scottish Labour Party       |        1999 | nan                                                |
| Clydesdale                                          | Karen Gillon            | Scottish Labour Party       |        1999 | nan                                                |
| Clydebank and Milngavie                             | Des McNulty             | Scottish Labour Party       |        1999 | Deputy Minister for Communities                    |
| Cunninghame South                                   | Irene Oldfather         | Scottish Labour Party       |        1999 | nan                                                |
| Strathkelvin and Bearsden                           | David Whitton           | Scottish Labour Party       |        2007 | nan                                                |
| Edinburgh South                                     | Mike Pringle            | Scottish Liberal Democrats  |        2003 | nan                                                |
| North East Fife                                     | Iain Smith              | Scottish Liberal Democrats  |        1999 | nan                                                |
| West Aberdeenshire and Kincardine                   | Mike Rumbles            | Scottish Liberal Democrats  |        1999 | nan                                                |
| Glasgow                                             | Robert Brown            | Scottish Liberal Democrats  |        1999 | nan                                                |
| West of Scotland                                    | Ross Finnie             | Scottish Liberal Democrats  |        1999 | Minister for the Environment and Rural Development |
| Tweeddale, Ettrick and Lauderdale                   | Jeremy Purvis           | Scottish Liberal Democrats  |        1999 | nan                                                |
| Edinburgh West                                      | Margaret Smith          | Scottish Liberal Democrats  |        1999 | nan                                                |
| Dunfermline West                                    | Jim Tolson              | Scottish Liberal Democrats  |        2007 | nan                                                |
| Central Scotland                                    | Hugh O'Donnell          | Scottish Liberal Democrats  |        2007 | nan                                                |
| South of Scotland                                   | Derek Brownlee          | Scottish Conservative Party |        2005 | nan                                                |
| Glasgow                                             | Anne McLaughlin         | Scottish National Party     |        2009 | nan                                                |
| Lothian                                             | Shirley-Anne Somerville | Scottish National Party     |        2007 | [MISSING]                                          |
| Lothian (was previously member in West of Scotland) | Bill Wilson             | Scottish National Party     |        2007 | nan                                                |



row_idx: 24
col_idx: 4
col_name: Office previously held
label: nan