Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| number | previous br no | taken into deptal stock | withdrawn | disposal |
| 17 | 61059 | 1963 | 1966 | scrapped (1966) |
| 18 | 61181 | 1963 | 1965 | scrapped (1966) |
| 19 | 61204 | 1963 | 1966 | scrapped (1966) |
| 20 | 61205 | 1963 | 1965 | scrapped (1966) |
| 21 | 61233 | 1963 | 1966 | scrapped (1966) |
| 22 | 61252 | 1963 | 1964 | scrapped (1966) |
| 23 | 61300 | 1963 | 1965 | scrapped (1966) |
| 24 (1st) | 61323 | 1963 | 1963 | scrapped (1964) |
| 24 (2nd) | 61375 | 1963 | 1966 | scrapped (1966) |
| 25 | 61272 | 1965 | 1966 | scrapped (1966) |
| 26 | 61138 | 1965 | 1967 | scrapped (1968) |
| 27 | 61105 | 1965 | 1966 | scrapped (1966) |
| 28 | 61194 | 1965 | 1966 | scrapped (1966) |
| 29 | 61264 | 1965 | 1967 | woodham brothers , later preserved |
| 30 | 61050 | 1966 | 1968 | scrapped (1968) |
| 31 (2nd) | 61051 | 1966 | 1966 | scrapped (1966) |
Title:
lner thompson class b1
Statement:
number 21 has a previous br number 61233
Answer:
supported