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: national ambient air quality standards
Table Content:
| pollutant | type | standard | averaging time | regulatory citation |
| --- | --- | --- | --- | --- |
| so 2 | primary | 0.14 ppm (365 μg / m 3 ) | 24 - hour | 40 cfr 50.4 (b) |
| so 2 | primary | 0.030 ppm (80 μg / m cubic) | annual | 40 cfr 50.4 (a) |
| so 2 | secondary | 0.5 ppm (1300 μg / m cubic) | 3 - hour | 40 cfr 50.5 (a) |
| pm 10 | primary and secondary | 150 μg / m cubic | 24 - hour | 40 cfr 50.6 (a) |
| pm 2.5 | secondary | 35 μg / m cubic | 24 - hour | 40 cfr 50.7 (a) |
| pm 2.5 | primary | 15 μg / m cubic | annual | 40 cfr 50.7 (a) |
| co | primary | 35 ppm (40 mg / m cubic) | 1 - hour | 40 cfr 50.8 (a) (2) |
| co | primary | 9 ppm (10 mg / m cubic) | 8 - hour | 40 cfr 50.8 (a) (1) |
| o 3 | primary and secondary | 0.12 ppm (235 μg / m cubic) | 1 - hour | 40 cfr 50.9 (a) |
| o 3 | primary and secondary | 0.075 ppm (150 μg / m cubic) | 8 - hour | 40 cfr 50.10 (a) |
| no 2 | primary and secondary | 0.053 ppm (100 μg / m cubic) | annual | 40 cfr 50.11 (a) and (b) |
| pb | primary and secondary | 0.15 μg / m cubic | rolling 3 months | 40 cfr 50.12 |


Statement
regulatory citation for only 2 pollutant , co and no2 , be contain within the 40 crf 50


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