| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [vb pp] that [num] | 65 |
|
| 2 | it is estimated that [num] | 24 |
|
| 3 | it is [vb pp] that one | 18 |
|
| 4 | it is said that [num] | 8 |
|
| 5 | it is believed that [num] | 6 |
|
| 6 | it is [vb pp] that two | 6 |
|
