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:
| Model                        |   Image | Caliber   | Type                         | Origin                                  | Details                                                                                                                      |
|:-----------------------------|--------:|:----------|:-----------------------------|:----------------------------------------|:-----------------------------------------------------------------------------------------------------------------------------|
| 82-BM-37                     |     nan | 82 mm     | Infantry mortar              | Soviet Union                            | nan                                                                                                                          |
| 2B9M Vasilek                 |     nan | 82 mm     | Gun-mortar                   | Soviet Union                            | Possible Chinese copy (W99). At least one in use by Ansar al-Sham. Unclear origin.                                           |
| Improvised mortars           |     nan | Various   | Improvised mortar            | / Syria                                 | nan                                                                                                                          |
| 10.5 cm leFH 18M             |     nan | 105 mm    | Howitzer                     | Nazi Germany                            | nan                                                                                                                          |
| 122 mm howitzer M1938 (M-30) |     nan | 122mm     | Howitzer                     | Soviet Union                            | Captured during Ramouseh Artillery Base assault by Jaish al Fateh                                                            |
| D-30                         |     nan | 122 mm    | Howitzer                     | Soviet Union                            | Captured from the Syrian Army                                                                                                |
| "Hell cannon"                |     nan | Various   | Improvised howitzer          | Syria                                   | Improvised howitzer that fires propane gas cylinders. Originated with the Ahrar al-Shamal Brigades, now used widely.         |
| M-46                         |     nan | 130 mm    | Field gun                    | Soviet Union                            | nan                                                                                                                          |
| 180 mm gun S-23              |     nan | 180mm     | Heavy Gun                    | Soviet Union                            | Captured during Ramouseh Artillery Base assault by Jaish al Fateh                                                            |
| 152 mm howitzer 2A65         |     nan | 152mm     | Howitzer                     | Soviet Union                            | nan                                                                                                                          |
| FH70                         |     nan | 155mm     | Howitzer                     | European Union                          | Delivered by the UK.                                                                                                         |
| 2S1 Gvozdika                 |     nan | 122 mm    | Self propelled howitzer      | Soviet Union                            | Armed with D-30 howitzer.                                                                                                    |
| 2S3 Akatsiya                 |     nan | 152.4 mm  | Self propelled howitzer      | Soviet Union                            | Armed with D-22 howitzer.                                                                                                    |
| B-10 Type 65                 |     nan | 82 mm     | Recoilless rifle             | Soviet Union People's Republic of China | Chinese copy of B-10.                                                                                                        |
| M60                          |     nan | nan       | Recoilless rifle             | Yugoslavia                              | Supplied by Saudi Arabia.                                                                                                    |
| M40                          |     nan | 105 mm    | Recoilless rifle             | United States                           | Possible Iranian copy.                                                                                                       |
| [MISSING]                    |     nan | 84 mm     | Recoilless rifle             | Sweden                                  | nan                                                                                                                          |
| SPG-9                        |     nan | 73 mm     | Recoilless rifle             | Soviet Union                            | nan                                                                                                                          |
| Type 63                      |     nan | 106.7 mm  | Multiple rocket launcher     | People's Republic of China              | Possible Iranian copy.                                                                                                       |
| RAK-12                       |     nan | 128 mm    | Multiple rocket launcher     | Croatia                                 | Croatian built version of Yugoslavian M-63 Plamen with 12 rocket tubes instead of the original 32. Supplied by Saudi Arabia. |
| Katyusha                     |     nan | nan       | Multiple Rocket Launcher     | Soviet Union                            | nan                                                                                                                          |
| BM-21 Grad                   |     nan | 122 mm    | Multiple rocket launcher     | Soviet Union                            | Initially captured from the Syrian Army, later supplied by Saudi Arabia from Bulgaria.                                       |
| Grad-P                       |     nan | 122 mm    | Light portable rocket system | Soviet Union                            | nan                                                                                                                          |
| Improvised rocket launchers  |     nan | Various   | Rocket launcher              | / Syria                                 | nan                                                                                                                          |
| BM-27 Uragan                 |     nan | 220 mm    | Multiple rocket launcher     | Soviet Union                            | nan                                                                                                                          |
| Khaibar                      |     nan | 302 mm    | Multiple rocket launcher     | China Syria                             | nan                                                                                                                          |



row_idx: 16
col_idx: 0
col_name: Model
label: Carl Gustav 84mm