Treasure is a type of Collection. Pack is a type of Collection. 
People can Gay. Gay is the opposite of Straight. Straight is a different concept from Slope. Slope is a synonym of Pitch. 
Treasure --IsA--> Collection <--IsA-- Pack 
People --CapableOf--> Gay <--Antonym--> Straight <--DistinctFrom--> Slope <--Synonym--> Pitch 