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:
| School Name                                                            | Grades    | Area   | Location                                 |
|:-----------------------------------------------------------------------|:----------|:-------|:-----------------------------------------|
| Alternative High School (at Clinton Ford Centre)                       | 10-12     | IV     | 5003 - 20 St. S.W.                       |
| Bowness High School                                                    | 10-12     | I      | 4627 - 77 St., N.W.                      |
| Centennial High School                                                 | [MISSING] | V      | 55 Sun Valley Blvd., S.E.                |
| Central Memorial High School                                           | 10-12     | IV     | 5111 - 21 St., S.W.                      |
| Crescent Heights High School                                           | 10-12     | II     | 1019 - 1 St., N.W.                       |
| Dr. E.P. Scarlett High School                                          | 10-12     | V      | 220 Canterbury Dr., S.W.                 |
| Ernest Manning High School                                             | 10-12     | IV     | 20 Springborough Boulevard S.W.          |
| Forest Lawn High School                                                | 10-12     | III    | 1304 - 44 St., S.E.                      |
| Henry Wise Wood High School                                            | 10-12     | V      | 910 - 75 Avenue, S.W.                    |
| Jack James High School                                                 | 10-12     | III    | 5105 - 8 Avenue, S.E.                    |
| James Fowler High School                                               | 10-12     | II     | 4004 - 4 St., N.W.                       |
| John G. Diefenbaker High School                                        | 10-12     | II     | 6620 - 4 St., N.W.                       |
| Lester B. Pearson High School                                          | 10-12     | III    | 3020 - 52 St. N.E.                       |
| Lord Beaverbrook High School                                           | 10-12     | V      | 9019 Fairmount Dr., S.E.                 |
| Nelson Mandela High School                                             | 10-12     | III    | 45 Saddletowne Circle NE                 |
| Robert Thirsk High School                                              | 10-12     | I      | 8777 Nose Hill Drive N.W.                |
| Sir Winston Churchill High School                                      | 10-12     | I      | 5220 Northland Dr., N.W.                 |
| Western Canada High School                                             | 10-12     | IV     | 641 - 17 Avenue, S.W.                    |
| William Aberhart High School                                           | 10-12     | II     | 3009 Morley Trail, N.W.                  |
| Juno Beach Academy of Canadian Studies (at Dr. Norman Bethune School ) | 7-12      | V      | 315 - 86 Avenue, S.E.                    |
| Louise Dean Centre                                                     | 7-12      | II     | 120 - 23 St. N.W.                        |
| National Sport School                                                  | 9-12      | IV     | Suite 101 - 151 Canada Olympic Rd., S.W. |
| Queen Elizabeth Junior/Senior High School                              | 7-12      | II     | 512 - 18 St., N.W.                       |
| CBe-learn (at Career and Technology Centre)                            | 7-12      | All    | 2336 53 Avenue. S.W.                     |
| Career and Technology Centre (at Lord Shaughnessy High School)         | 7-12      | All    | 2336 53 Avenue, S.W.                     |



row_idx: 2
col_idx: 1
col_name: Grades
label: 10-12