(subclass EasterSunday ChristianHoliday) | Media.kif 484-484 | EasterSunday 是 ChristianHoliday 的 subclass |
(subclass EasterSunday Sunday) | Media.kif 485-485 | EasterSunday 是 星期日 的 subclass |
(subclass EasterSunday MoveableHoliday) | Media.kif 486-486 | EasterSunday 是 可动的假期 的 subclass |