| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an investigation [is] under [noun] | 6 |
|
| 2 | [art] investigation [is] under [noun] | 6 |
|
| 3 | a investigation [is] under [noun] | 6 |
|
| 4 | [art] investigation [is] under [noun] | 6 |
|
