| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] ' exposure to [noun] | 5 |
|
| 2 | [noun pl] ' exposure to [noun] | 5 |
|
| 3 | ' exposure to [adj] [noun] | 5 |
|
| 4 | ' exposure to [adj] [noun] | 5 |
|
