| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [be] subject to | 72 |
|
| 2 | had [be] subject to | 39 |
|
| 3 | [noun pl] had [be] subject | 11 |
|
| 4 | [noun pl] had [be] to | 10 |
|
