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: high - temperature superconductivity
Table Content:
| formula | notation | t c (k) | no of cu - o planes in unit cell | crystal structure |
| --- | --- | --- | --- | --- |
| yba 2 cu 3 o 7 | 123 | 92 | 2 | orthorhombic |
| bi 2 sr 2 cuo 6 | bi - 2201 | 20 | 1 | tetragonal |
| bi 2 sr 2 cacu 2 o 8 | bi - 2212 | 85 | 2 | tetragonal |
| bi 2 sr 2 ca 2 cu 3 o 6 | bi - 2223 | 110 | 3 | tetragonal |
| tl 2 ba 2 cuo 6 | tl - 2201 | 80 | 1 | tetragonal |
| tl 2 ba 2 cacu 2 o 8 | tl - 2212 | 108 | 2 | tetragonal |
| tl 2 ba 2 ca 2 cu 3 o 10 | tl - 2223 | 125 | 3 | tetragonal |
| tlba 2 ca 3 cu 4 o 11 | tl - 1234 | 122 | 4 | tetragonal |
| hgba 2 cuo 4 | hg - 1201 | 94 | 1 | tetragonal |
| hgba 2 cacu 2 o 6 | hg - 1212 | 128 | 2 | tetragonal |
| hgba 2 ca 2 cu 3 o 8 | hg - 1223 | 134 | 3 | tetragonal |


Statement
2 no of cu - o plane in unit cell be the most common formula


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