| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | problem was [art] | 86 |
|
| 2 | problem was the | 67 |
|
| 3 | problem was the | 67 |
|
| 4 | problem was a | 18 |
|
| 5 | problem was a | 17 |
|
