SimilarityRank
be_unknown 0.673 8723
be_unclear 0.651 18231
be_not_know 0.649 21842
it_be_unclear 0.645 96477
it_be_hard_to_say 0.632 62167
it_be_not_clear 0.619 43210
remain_a_mystery 0.615 70041
remain_unclear_. 0.609 61353
be_not_clear 0.598 25766
it_be_unclear_whether 0.596 62460
remain_unknown_. 0.587 83257
we_be_not_sure 0.581 82655
it_be_not_clear_whether 0.579 72966
curious_as 0.573 87118
remain_unknown 0.571 95834
be_uncertain 0.555 25526
I_have_no_idea 0.539 27343
we_do_not_know 0.536 21798
no_one_know 0.535 42689
be_a_mystery 0.533 49852
it_be_hard_to_tell 0.525 78396
I_be_not_sure 0.525 10313
have_no_idea 0.522 68416
we_do_not_know_what 0.513 70917
and_to_what_extent 0.512 52964