| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problems [that] [am/are] [prep] | 7 |
|
| 2 | problems that [am/are] [prep] | 7 |
|
| 3 | problems that [am/are] [prep] | 7 |
|
| 4 | problems [conj] are [prep] | 7 |
|
| 5 | problems [conj] [am/are] [prep] | 7 |
|
