| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be therefore [adj] [to-vb] at [art] | 5 |
|
| 2 | [be] therefore [adj] [to-vb] at [art] | 5 |
|
| 3 | is therefore [adj] [to-vb] at [art] | 5 |
|
| 4 | [is] therefore [adj] [to-vb] at [art] | 5 |
|
