| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be obtain [prep] [adj] [noun pl] | 32 |
|
| 2 | may be [prep] [adj] [noun pl] | 30 |
|
| 3 | may be obtain [prep] [adj] | 15 |
|
| 4 | may be obtain [prep] [noun pl] | 10 |
|
