Random triples
| Subject | Object |
|---|---|
| gptkb:Jupiter-family_comets | less than 20 years |
| gptkb:Securities_and_Exchange_Commission | every five years |
| gptkb:comet_70_P/_Schwassmann-Wachmann_41 | 5.4 years. |
| gptkb:Cassini_periodical_cicada | 13 years |
| gptkb:Sozin's_Comet | every 100 years |
| gptkb:Comet_Hale-Bopp | non-periodic |