| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be against [adj] background that | 30 |
|
| 2 | it be [prep] [det] background that | 30 |
|
| 3 | it be [prep] this background that | 26 |
|
| 4 | it be [prep] this background that | 26 |
|
| 5 | it is [prep] [adj] background that | 18 |
|
| 6 | it was [prep] [adj] background that | 12 |
|
