| Similarity | Rank | |
|---|---|---|
| remain_unclear_. | 0.797 | 61353 |
| remain_unknown | 0.780 | 95834 |
| be_unknown | 0.772 | 8723 |
| be_not_know | 0.744 | 21842 |
| remain_a_mystery | 0.721 | 70041 |
| be_unclear | 0.699 | 18231 |
| be_not_clear | 0.640 | 25766 |
| it_be_unknown | 0.587 | 73475 |
| be_uncertain | 0.584 | 25526 |
| be_a_mystery | 0.547 | 49852 |
| have_be_implicate_in | 0.544 | 83034 |
| we_do_not_know | 0.540 | 21798 |
| no_one_know | 0.530 | 42689 |
| it_be_unclear | 0.527 | 96477 |
| believe_to | 0.514 | 4503 |
| know_about | 0.499 | 5185 |
| be_implicate_in | 0.499 | 57259 |
| nobody_know | 0.492 | 74533 |
| it_be_not_clear_whether | 0.488 | 72966 |
| be_not_know_to | 0.478 | 78162 |
| be_already_know | 0.476 | 79443 |
| it_be_unclear_whether | 0.474 | 62460 |
| implicate | 0.472 | 22842 |
| may_explain | 0.471 | 74264 |
| be_well_document | 0.470 | 39072 |