| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] the first half of | 18 |
|
| 2 | [vb past] [prep] the first half of | 18 |
|
| 3 | [vb past] in the first half of | 8 |
|
| 4 | [vb past] in the first half of | 8 |
|
