| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem that [vb base] [prep] the | 8 |
|
| 2 | problem that [vb base] [prep] the | 8 |
|
| 3 | problem that [vb base] [prep] [art] | 8 |
|
| 4 | problems that [vb base] [prep] [art] | 8 |
|
| 5 | problem that [vb base] [prep] [art] | 8 |
|
