| Similarity | Rank | |
|---|---|---|
| the_threat_pose_by | 0.643 | 82481 |
| challenge_associate_with | 0.640 | 61107 |
| the_challenge_face | 0.627 | 22143 |
| these_challenge | 0.619 | 16957 |
| global_challenge | 0.608 | 41446 |
| the_challenge_face_by | 0.599 | 42818 |
| current_challenge | 0.590 | 50315 |
| pose_by | 0.588 | 37371 |
| various_challenge | 0.581 | 99907 |
| challenge_relate_to | 0.580 | 80453 |
| the_challenge_ahead | 0.579 | 59436 |
| challenge | 0.576 | 222 |
| future_challenge | 0.575 | 41206 |
| challenge_face | 0.570 | 32972 |
| change_nature_of | 0.569 | 49268 |
| the_major_challenge | 0.568 | 66525 |
| the_unique_challenge | 0.566 | 90230 |
| specific_challenge | 0.564 | 92340 |
| that_we_face | 0.555 | 59337 |
| challenge_face_by | 0.555 | 66867 |
| new_challenge | 0.554 | 18398 |
| security_challenge | 0.552 | 64605 |
| challenge_we_face | 0.544 | 47011 |
| the_complexity_of | 0.544 | 8684 |
| the_main_challenge | 0.542 | 52376 |