| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | were built [prep] the [num ord] | 13 |
|
| 2 | were built [prep] the [num ord] | 13 |
|
| 3 | were built in the [num ord] | 6 |
|
| 4 | were built in the [num ord] | 6 |
|
