| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is that [art] [noun] | 112 |
|
| 2 | it is estimated that [art] | 49 |
|
| 3 | is estimated that [art] [noun] | 34 |
|
| 4 | it is estimated that [noun] | 15 |
|
