Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Number & Name | Description | Livery | Owner(s) | Date |
| --- | --- | --- | --- | --- |
| Operational | Operational | Operational | Operational | Operational |
| No. 15097 | Simplex 0-4-0PM | BR Black with the Early Crest . | Private owner. | 1919 |
| No. 15099 Morris | Simplex 0-4-0DM | BR Black with the Early Crest . | Simplex 2028 Association. | 1920 |
| Marblaegis | Ruston & Hornsby 88DS 0-4-0DM | Green. | Simplex 2028 Association. | 1946 |
| Qwag | Ruston & Hornsby 0-4-0DM | Green. | Private owner. | 1954 |
| No. 28 Bardon | Andrew Barclay 0-4-0DM | Lined Green. | Private owner. | 1956 |
| D2959 Staythorpe | Ruston & Hornsby 165 0-4-0DE | BR Green with the Late Crest . | Private owner. | 1961 |
| Undergoing overhaul, restoration or repairs | Undergoing overhaul, restoration or repairs | Undergoing overhaul, restoration or repairs | Undergoing overhaul, restoration or repairs | Undergoing overhaul, restoration or repairs |
| Stored or static | Stored or static | Stored or static | Stored or static | Stored or static |
| No. D4279 Arthur Wright | John Fowler 0-4-0DM | Dark blue. | Private owner. | 1952 |
Question:
What is the date for the Operational Livery?
Answer:
Operational