| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back [prep] the [adj] [noun pl] | 344 |
|
| 2 | dates back [prep] the [adj] | 49 |
|
| 3 | dates back [prep] the [noun pl] | 6 |
|
| 4 | dates [prep] the [adj] [noun pl] | 5 |
|
