| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] when [art] [noun] | 188 |
|
| 2 | [noun prp] 1991 [art] [noun] | 182 |
|
| 3 | 1991 when [art] [noun] | 16 |
|
| 4 | [noun prp] 1991 when [art] | 14 |
|
| 5 | [noun prp] 1991 when [noun] | 13 |
|
