| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it occurred [prep] [pers pn] | 16 |
|
| 2 | it has [prep] [pers pn] | 14 |
|
| 3 | it has occurred [prep] | 13 |
|
| 4 | has occurred [prep] [pers pn] | 10 |
|
