| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [ex0] have [been] some concern | 8 |
|
| 2 | [pron] have [been] some concern | 8 |
|
| 3 | there have [been] some concern | 8 |
|
| 4 | there have [been] some concern | 8 |
|
