Gallery is a type of Corridor. Gallery is a type of Building. Building is related to Column. Column is related to Thin. 
Birthday is related to Year. Year is a different concept from Hour. Hour is related to Interval. Interval is a synonym of Spell. 
Corridor <--IsA-- Gallery --IsA--> Building <--RelatedTo--> Column <--RelatedTo--> Thin 
Birthday <--RelatedTo--> Year <--DistinctFrom--> Hour <--RelatedTo--> Interval <--Synonym--> Spell 