SimilarityRank
future_challenge 0.756 41206
challenge_face 0.699 32972
the_challenge_face 0.674 22143
the_key_challenge 0.674 74955
challenge_relate_to 0.667 80453
specific_challenge 0.661 92340
the_major_challenge 0.654 66525
current_problem 0.642 54692
major_challenge 0.640 94021
common_challenge 0.636 99524
challenge 0.626 222
these_challenge 0.625 16957
challenge_face_by 0.620 66867
global_challenge 0.617 41446
various_challenge 0.616 99907
challenge_associate_with 0.615 61107
the_challenge_ahead 0.612 59436
new_challenge 0.606 18398
the_challenge_face_by 0.603 42818
key_issue 0.601 15544
challenge_we_face 0.600 47011
the_main_challenge 0.596 52376
the_challenge_pose_by 0.590 96527
Challenges 0.583 14291
emerge_issue 0.582 75696