SimilarityRank
problem_with 0.819 3733
these_problem 0.787 12503
this_problem 0.782 4064
such_problem 0.776 41208
problem_relate_to 0.775 33222
major_problem 0.765 34279
related_problem 0.744 65450
specific_problem 0.725 57049
serious_problem 0.725 48894
problem_cause_by 0.722 59711
big_problem 0.718 39556
various_problem 0.714 94278
current_problem 0.708 54692
the_real_problem 0.704 29156
solve 0.701 2389
problem_associate_with 0.699 33102
of_these_problem 0.695 78749
real_problem 0.691 71844
a_big_problem 0.690 88869
another_problem 0.688 52607
problem_face 0.686 83674
practical_problem 0.683 74534
the_same_problem 0.678 37541
the_big_problem 0.673 25566
a_problem_with 0.672 19265