SimilarityRank
practical_issue 0.698 89751
problem 0.683 185
complex_problem 0.667 48012
problem_relate_to 0.653 33222
specific_problem 0.648 57049
political_problem 0.641 63987
real_problem 0.640 71844
various_problem 0.630 94278
such_problem 0.623 41208
current_problem 0.622 54692
these_problem 0.609 12503
technical_problem 0.608 42808
practical_application 0.596 25623
problem_face 0.592 83674
solve_problem 0.591 15079
social_problem 0.591 19159
problem_associate_with 0.584 33102
technical_issue 0.584 29163
economic_problem 0.571 38699
environmental_problem 0.571 25380
fundamental_issue 0.565 91852
solve 0.565 2389
technical_challenge 0.564 52969
challenge_relate_to 0.563 80453
complex_issue 0.559 58383