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:
| Name | Builder | Type | Works Number | Built |
| --- | --- | --- | --- | --- |
| Pioneer | Andrew Barclay & Co | 0-4-0 WT (converted to 0-4-2 WT) | unknown | 1876.0 |
| Chevalier | Andrew Barclay & Co | 0-4-0 ST (converted to 0-4-2 ST) | 269 | 1885.0 |
| Princess | Kerr Stuart | 0-4-2 T | 717 | 1900.0 |
| Argyll | Andrew Barclay & Co | 0-6-2 T | 1049 | 1906.0 |
| Atlantic | Andrew Barclay & Co | 0-6-2 T | 1098 | 1907.0 |
Question:
What is Type, when Works Number is "unknown"?
Answer:
0-4-0 WT (converted to 0-4-2 WT)