Silk is related to Nice. Nice is a different concept from Evil. 
Classify is a type of Restrict. Restrict is a synonym of Bind. Bind is a synonym of Rope. Rope is related to Soap. 
Silk <--RelatedTo--> Nice <--DistinctFrom--> Evil 
Classify --IsA--> Restrict <--Synonym--> Bind <--Synonym--> Rope <--RelatedTo--> Soap 