| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | referred to [prep] the [num ord] | 15 |
|
| 2 | referred [prep] [prep] the [num ord] | 15 |
|
| 3 | referred [prep] in the [num ord] | 9 |
|
| 4 | referred [prep] in the [num ord] | 9 |
|
