| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | BR Standard Class 5 - Design and construction |  |  |  |  |
| 3 | Number | Date | Builder | Valve gear | Notes |
| 4 | 73000-28 | 1951 | Derby | Walschaerts | - |
| 5 | 73029-49 | 1953 | Derby | Walschaerts | - |
| 6 | 73050-74 | 1954 | Derby | Walschaerts | - |
| 7 | 73075-99 | 1955 | Derby | Walschaerts | - |
| 8 | 73100-108 | 1955 | Doncaster | Walschaerts | - |
| 9 | 73109-124 | 1956 | Doncaster | Walschaerts | - |
| 10 | 73125-144 | 1956 | Derby | Caprotti | Poppet valves |
| 11 | 73145-154 | 1957 | Derby | Caprotti | Poppet valves |
| 12 | 73155-158 | 1956 | Doncaster | Walschaerts | - |
| 13 | 73159-171 | 1957 | Doncaster | Walschaerts | - |

Question: What valve gears and poppet values were 73125 to 73154 built with?
Answer: The numbers 73125 to 73154, were built with Caprotti valve gear and poppet valves.