| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] shown to [be] [adv] effective | 7 |
|
| 2 | been shown to [be] [adv] effective | 7 |
|
| 3 | [be] shown to [be] [adv] effective | 7 |
|
| 4 | be shown to [be] [adv] effective | 7 |
|
