| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may be obtained [prep] | 178 |
|
| 2 | may be obtain [prep] | 178 |
|
| 3 | may be obtain from | 101 |
|
| 4 | may be obtain by | 47 |
|
| 5 | may be obtain on | 5 |
|
| 6 | may be obtain in | 5 |
|
