| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [vb pp] [prep] the 1960s | 12 |
|
| 2 | had [vb pp] [prep] the 1960s | 12 |
|
| 3 | had [vb pp] [prep] [art] 1960s | 12 |
|
| 4 | had [vb pp] in [art] 1960s | 9 |
|
