| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] [adv] been a source | 8 |
|
| 2 | [noun sg] [verb] [adv] been a source | 5 |
|
| 3 | [verb] [adv] been a [adj] source | 6 |
|
| 4 | [verb] [adv] been a [adj] source | 6 |
|
| 5 | [verb] [adv] been a source of | 12 |
|
| 6 | [verb] [adv] been a source [prep] | 12 |
|
| 7 | [verb] [adv] been a source of | 12 |
|
| 8 | [verb] [adv] been a source [prep] | 12 |
|
