Random triples
| Subject | Object |
|---|---|
| gptkb:Gregorian_calendar_(for_official_purposes) | leap year every 4 years except years divisible by 100 unless also divisible by 400 |
| gptkb:Gregorian_calendar_(for_civil_use) | leap year every 4 years except years divisible by 100 unless also divisible by 400 |
| gptkb:Gregorian_calendar_(some_jurisdictions) | leap year every 4 years except years divisible by 100 unless divisible by 400 |
| gptkb:Old_Calendar | one leap year every four years |