(subclass AdventSunday ChristianHoliday) | Media.kif 310-310 | AdventSunday 是 ChristianHoliday 的 subclass |
(subclass AdventSunday Sunday) | Media.kif 311-311 | AdventSunday 是 星期日 的 subclass |
(subclass AdventSunday MoveableHoliday) | Media.kif 312-312 | AdventSunday 是 可动的假期 的 subclass |