| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | investigation [is] under [noun sg] | 8 |
|
| 2 | investigation [is] under [noun] | 8 |
|
| 3 | investigation [is] under way | 8 |
|
| 4 | investigation is under [noun] | 8 |
|
| 5 | investigation [is] under way | 8 |
|
