SimilarityRank
be_very_difficult 0.834 37607
be_not_easy 0.728 17254
difficult 0.724 2515
very_difficult 0.713 34974
extremely_difficult 0.694 93625
can_be_difficult 0.686 30674
be_very_hard 0.676 91214
,_if_not_impossible 0.673 78666
be_tricky 0.661 48836
it_be_very_difficult_to 0.641 29790
be_not_an_easy_task 0.633 79512
it_be_difficult 0.624 31149
be_difficult_to 0.623 37814
be_impossible 0.612 18147
be_the_most_difficult 0.608 91080
it_be_very_difficult 0.608 71675
be_hard_to 0.602 23656
more_difficult 0.602 14322
be_not_always_easy 0.601 89460
be_difficult_for 0.597 52554
a_difficult 0.592 12053
be_complicate 0.591 31245
it_be_very_hard_to 0.590 86037
it_be_difficult_to 0.590 12556
it_be_not_easy 0.585 29647