SimilarityRank
security_issue 0.817 19872
security_threat 0.747 47415
security_concern 0.737 37021
security_risk 0.725 53682
security_challenge 0.719 64605
political_problem 0.647 63987
problem 0.640 185
these_problem 0.615 12503
such_problem 0.601 41208
security_breach 0.584 70052
economic_problem 0.582 38699
security 0.577 651
serious_problem 0.574 48894
security_measure 0.574 29180
terrorist_threat 0.570 56862
improve_security 0.569 89990
problem_relate_to 0.560 33222
current_problem 0.553 54692
this_problem 0.552 4064
major_problem 0.552 34279
technical_problem 0.552 42808
privacy_issue 0.550 62834
problem_face 0.548 83674
of_these_problem 0.545 78749
security_policy 0.540 26340