SimilarityRank
remain_unknown_. 0.797 83257
be_unclear 0.782 18231
be_not_clear 0.704 25766
be_unknown 0.687 8723
be_not_know 0.667 21842
remain_unknown 0.665 95834
remain_a_mystery 0.655 70041
be_uncertain 0.636 25526
it_be_unknown 0.609 73475
it_be_unclear 0.591 96477
it_be_unclear_whether 0.584 62460
it_be_not_clear_whether 0.552 72966
it_be_not_clear 0.532 43210
may_influence 0.529 61228
raise_question_about 0.526 38548
vary_widely 0.521 54865
unclear 0.498 31853
have_be_implicate_in 0.498 83034
may_depend_on 0.493 92934
we_do_not_know 0.491 21798
it_be_hard_to_say 0.488 62167
to_elucidate 0.487 63834
may_affect 0.485 29897
will_depend_on 0.484 18645
be_unrelated_to 0.483 96160