| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be trigger off by [art] | 5 |
|
| 2 | [be] trigger off by [art] | 5 |
|
| 3 | trigger off by [art] [noun] | 9 |
|
| 4 | trigger off by [art] [noun sg] | 8 |
|
