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:
| 1946 Nos | 1947 Nos | Date | Built at | LMS Nos | BR Nos |
| --- | --- | --- | --- | --- | --- |
| 3100-24 | 3500-24 | 1944.0 | Brighton | 8705-29 | 48705-29 |
| 3125-34 | 3525-34 | 1945.0 | Darlington | 8730-9 | 48730-9 |
| 3135-47 | 3535-47 | 1946.0 | Darlington | 8740-52 | 48740-52 |
| 3148-55 | 3548-55 | 1945.0 | Doncaster | 8753-60 | 48753-60 |
| 3156/7 | 3556/7 | 1946.0 | Doncaster | 8761/2 | 48761/2 |
| 3158-67 | 3558-67 | 1946.0 | Doncaster | 8763-72 | 48763-72 |
Question:
Which Built at has a Date of 1946, and a 1947 Nos of 3556/7?
Answer:
Doncaster