| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [v-ing] [art] [num] | 61 |
|
| 2 | [v-ing] [art] [num] year | 54 |
|
| 3 | is [art] [num] year | 31 |
|
| 4 | is [v-ing] [art] year | 9 |
|
