| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] estimated that [adj] [n mass] | 7 |
|
| 2 | it be estimated [that] [adj] [n mass] | 7 |
|
| 3 | it was estimated [that] [adj] [n mass] | 5 |
|
| 4 | it [was/were] estimated [that] [adj] [n mass] | 5 |
|
