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: list of vehicle speed records
Table Content:
| category | speed (km / h) | speed (mph) | vehicle | pilot | date |
| --- | --- | --- | --- | --- | --- |
| rocket - powered aircraft | 7258.0 | 4510.0 | north american x - 15 | william j knight | 3 oct 1967 |
| manned air - breathing craft | 3530.0 | 2194.0 | lockheed sr - 71 blackbird | eldon w joersz | 28 jul 1976 |
| propeller - driven aircraft | 870.0 | 541.0 | tupolev tu - 114 | ivan soukhomline | 00 jan 1960 |
| piston - engined propeller - driven aircraft | 850.1 | 528.33 | grumman f8f bearcat rare bear (n777l) | lyle shelton | 21 aug 1989 |
| helicopter | 401.0 | 249.1 | westland lynx 800 g - lynx | john egginton | 11 aug 1986 |
| glider (sailplane) | 306.8 | 190.6 | schempp - hirth nimbus - 4dm | klaus ohlmann and matias garcia mazzaro | 22 dec 2006 |
| human - powered aircraft | 32.0 | 19.8 | mit monarch b | frank scarabino | 1 may 1984 |


Statement
all of the vehicle speed record occur in the 20th century


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