| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] [noun pl] is that | 169 |
|
| 2 | the [noun pl] is [that] | 167 |
|
| 3 | [art] problems is [that] | 17 |
|
| 4 | [art] difficulties is [that] | 6 |
|
