| 1 | But they are not unprecedented. | |
| 2 | The scale of this crash, said officials, was unprecedented. | |
| 3 | It is unprecedented for prosecutors to discredit their own star witness. | |
| 4 | In an unprecedented move, the tribunal ask the witness to sing a song. | |
| 5 | The plunge in sales of existing homes is severe but not unprecedented. |