| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the main problem [is] [conj] [art] | 7 |
|
| 2 | [art] main problem [is] [conj] [art] | 7 |
|
| 3 | [art] main problem [is] [conj] [art] | 7 |
|
| 4 | the main problem [is] [conj] [art] | 7 |
|
| 5 | main problem [is] [conj] [art] [noun] | 5 |
|
| 6 | main problem [is] [conj] [art] [noun sg] | 5 |
|
