| Similarity | Rank | |
|---|---|---|
| be_unknown | 0.891 | 8723 |
| remain_unknown | 0.772 | 95834 |
| remain_unknown_. | 0.744 | 83257 |
| be_unclear | 0.711 | 18231 |
| be_not_clear | 0.692 | 25766 |
| remain_a_mystery | 0.673 | 70041 |
| be_uncertain | 0.668 | 25526 |
| remain_unclear_. | 0.667 | 61353 |
| no_one_know | 0.652 | 42689 |
| we_do_not_know | 0.650 | 21798 |
| it_be_unknown | 0.649 | 73475 |
| be_not_know_to | 0.607 | 78162 |
| not_know | 0.589 | 17980 |
| be_not_specify | 0.585 | 72855 |
| nobody_know | 0.570 | 74533 |
| be_already_know | 0.567 | 79443 |
| be_a_mystery | 0.551 | 49852 |
| do_not_specify | 0.543 | 99897 |
| do_not_reveal | 0.541 | 84708 |
| be_well_know | 0.534 | 17747 |
| only_know | 0.534 | 20973 |
| do_not_know | 0.530 | 10490 |
| he_do_not_know | 0.527 | 53219 |
| it_be_not_clear_whether | 0.526 | 72966 |
| know | 0.526 | 278 |