Random triples
| Subject | Object |
|---|---|
| gptkb:Post-Civil_War_American_West | closing of the frontier |
| gptkb:American_Frontier | U.S. Census Bureau declaration of closed frontier |
| gptkb:Post-Civil_War_American_West | 1890 U.S. Census |
| gptkb:Satya_Yuga | decline of virtue |
| gptkb:Greek_Dark_Ages | rise of city-states |
| gptkb:Greek_Dark_Ages | reintroduction of writing |