| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years before [art] [noun sg] is | 11 |
|
| 2 | [num] years before [art] [noun sg] is | 11 |
|
| 3 | two years before [art] [noun sg] is | 5 |
|
| 4 | two years before [art] [noun sg] is | 5 |
|
| 5 | years before [art] [noun sg] is [verb] | 10 |
|
| 6 | years before [art] [noun sg] is [vb pp] | 10 |
|
