| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there [vb -s] [been] some concern | 6 |
|
| 2 | [pron] [vb -s] [been] some concern | 6 |
|
| 3 | [ex0] [vb -s] [been] some concern | 6 |
|
| 4 | there [vb -s] [been] some concern | 6 |
|
