| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | caused by a [adj] [noun] | 143 |
|
| 2 | [been] caused by a [noun] | 31 |
|
| 3 | [been] caused by [adj] [noun] | 31 |
|
| 4 | [been] caused by a [adj] | 11 |
|
