| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] teachers ' [noun] | 8 |
|
| 2 | [prep] a [adj] teachers ' [noun] | 8 |
|
| 3 | a [adj] teachers ' [noun] [prep] | 5 |
|
| 4 | a [adj] teachers ' [noun] [prep] | 5 |
|
