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: ensign racing
Table Content:
| year | chassis | engine (s) | tyres | points |
| --- | --- | --- | --- | --- |
| 1973 | ensign n173 | ford v8 | f | 0 |
| 1974 | ensign n174 | ford v8 | f | 0 |
| 1975 | ensign n174 ensign n175 | ford v8 | g | 1 |
| 1976 | ensign n174 ensign n176 | ford v8 | g | 2 |
| 1977 | ensign n177 | ford v8 | g | 10 |
| 1978 | ensign n177 | ford v8 | g | 1 |
| 1979 | ensign n177 ensign n179 | ford v8 | g | 0 |
| 1980 | ensign n180 | ford v8 | g | 0 |
| 1981 | ensign n180b | ford v8 | m a | 5 |
| 1982 | ensign n180b ensign n181 | ford v8 | p | 0 |


Statement
ensign race 's most successful season be 1980 , when it earn 10 point on the f1 race circuit


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