| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [art] [adj] period [prep] which | 7 |
|
| 2 | be [art] [adj] period [prep] which | 7 |
|
| 3 | be [art] [adj] period [prep] which | 6 |
|
| 4 | be a [adj] period [prep] which | 5 |
|
