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: zakspeed
Table Content:
| year | chassis | engine (s) | tyres | points |
| --- | --- | --- | --- | --- |
| 1985 | zakspeed 841 | zakspeed s4 t / c | g | 0 |
| 1986 | zakspeed 861 | zakspeed s4 t / c | g | 0 |
| 1987 | zakspeed 861 zakspeed 871 | zakspeed s4 t / c | g | 2 |
| 1988 | zakspeed 881 | zakspeed s4 t / c | g | 0 |
| 1989 | zakspeed 891 | yamaha v8 | p | 0 |


Statement
the zakspeed 891 chassis have a yamaha v8 engine


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