user
Instruction
This is a table fact verification task. The goal of this task is to distinguish whether the given statement is entailed or refuted by the given table.


Table
Table Title: british rail classes 253 , 254 and 255
Table Content:
| class | operator | number | year built | cars per set | unit numbers |
| --- | --- | --- | --- | --- | --- |
| class 253 | br western region | 27 | 1975 - 1977 | 9 | 253001 - 253027 |
| class 253 | br western region | 13 | 1978 - 1979 | 9 | 253028 - 253040 |
| class 253 | br cross country | 18 | 1981 - 1982 | 9 | 253041 - 253058 |
| class 254 | br eastern region br scottish region | 32 | 1977 - 1979 | 10 | 254001 - 254032 |
| class 254 | br eastern region br scottish region | 4 | 1982 | 10 | 254033 - 254037 |


Statement
13 class 253 be build between 1978 - 1979


Answer Format
The final answer should be either "entailed" or "refuted" and use the following format:
```json
{
    "answer": "entailed" or "refuted"
}
```
rule
["entailed"]