SimilarityRank
be_not_know 0.891 21842
remain_unknown 0.826 95834
remain_unknown_. 0.772 83257
be_unclear 0.739 18231
be_uncertain 0.732 25526
remain_a_mystery 0.720 70041
be_not_clear 0.692 25766
remain_unclear_. 0.687 61353
it_be_unknown 0.673 73475
we_do_not_know 0.665 21798
no_one_know 0.657 42689
be_a_mystery 0.618 49852
not_know 0.576 17980
unknown 0.572 3389
be_not_know_to 0.571 78162
nobody_know 0.565 74533
be_not_specify 0.554 72855
be_already_know 0.551 79443
do_not_know 0.545 10490
do_not_specify 0.530 99897
we_do_not_know_what 0.529 70917
only_know 0.523 20973
do_not_reveal 0.518 84708
he_do_not_know 0.517 53219
without_know 0.510 39905