| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [prep] [art] [det] | 278 |
|
| 2 | is [vb pp] [prep] [art] principles | 12 |
|
| 3 | [vb pp] [prep] [art] [det] principles | 12 |
|
