| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | become a [noun] | 924 |
|
| 2 | [verb] a issue | 199 |
|
| 3 | become a issue | 45 |
|
| 4 | [vb pp] a issue | 24 |
|
| 5 | become [art] issue | 11 |
|
