| Similarity | Rank | |
|---|---|---|
| in_U.S._history | 0.859 | 60655 |
| American_history | 0.666 | 28141 |
| world_history | 0.664 | 28733 |
| in_human_history | 0.646 | 48002 |
| U.S._history | 0.630 | 74846 |
| in_recent_history | 0.608 | 63781 |
| history | 0.593 | 354 |
| our_history | 0.583 | 12200 |
| the_Civil_War | 0.578 | 11655 |
| in_its_history | 0.574 | 46144 |
| modern_history | 0.572 | 93951 |
| the_American_Civil_War | 0.562 | 99889 |
| since_World_War_II | 0.553 | 67848 |
| in_America | 0.552 | 2624 |
| the_Civil_Rights_Movement | 0.552 | 62659 |
| the_American_revolution | 0.546 | 61560 |
| political_history | 0.531 | 61414 |
| Abraham_Lincoln | 0.527 | 21472 |
| the_history_of | 0.527 | 1208 |
| in_American_society | 0.524 | 93864 |
| one_of_America | 0.524 | 66793 |
| the_Revolutionary_War | 0.514 | 89614 |
| of_the_twentieth_century | 0.513 | 38975 |
| in_the_twentieth_century | 0.509 | 42594 |
| the_civil_right_movement | 0.507 | 34283 |