(domainSubclass birthday 2 Day)	Mid-level-ontology.kif 24232-24232	域子類 生日, 2 and Day
(domainSubclass daylightHoursInterval 2 Day)	Weather.kif 847-847	域子類 白天小時間隔, 2 and Day
(domainSubclass daylightHoursTotal 2 Day)	Weather.kif 857-857	域子類 白天的總時數, 2 and Day
(domainSubclass weddingAnniversary 2 Day)	Mid-level-ontology.kif 24191-24191	域子類 weddingAnniversary, 2 and Day

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Sigma version 3.0 is open source software produced by Articulate Software and its partners