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:
| 1st built | 1913 Class | W.A. | No. Built | Builder | Date | LNER Class |
| --- | --- | --- | --- | --- | --- | --- |
| 474.0 | — | 2-2-2 | 2.0 | Neilson | 1876 | — |
| 476.0 | M | 4-4-0 | 12.0 | Neilson (8) NBR Cowlairs (4) | 1877–79 | D27/D28 |
| 494.0 | P | 4-4-0T | 3.0 | Neilson | 1879 | D50 |
| 72.0 | R | 4-4-0T | 30.0 | NBR Cowlairs | 1880–84 | D51 |
| 157.0 | P | 0-4-2T | 6.0 | NBR Cowlairs | 1877 | G8 |
| 100.0 | C | 0-6-0 | 32.0 | NBR Cowlairs (12) Neilson (20) | 1876–77 | J32 |
| 34.0 | D | 0-6-0 | 13.0 | NBR Cowlairs | 1879 | J34 |
| 497.0 | D | 0-6-0 | 88.0 | NBR Cowlairs (83) Dübs (5) | 1879–83 | J34 |
| 165.0 | R | 0-6-0T | 25.0 | NBR Cowlairs | 1875–78 | J82 |
| 546.0 | G | 0-4-0T | 2.0 | Neilson | 1882 | Y9 |
Question:
What is the 1913 class of locomotive that has a 1st built value under 494 and WA of 4-4-0t?
Answer:
R