| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] that [art] [noun] | 117 |
|
| 2 | it [is] estimated that [art] | 52 |
|
| 3 | [is] estimated that [art] [noun] | 37 |
|
| 4 | it [is] estimated that [noun] | 16 |
|
