Expertise is related to Skill. Skill is related to Attribute. Attribute is related to Bad. 
Class is related to Rank. Rank is related to Rate. Rate is related to Interest. Interest is a synonym of Involvement. 
Expertise <--RelatedTo--> Skill <--RelatedTo--> Attribute <--RelatedTo--> Bad 
Class <--RelatedTo--> Rank <--RelatedTo--> Rate <--RelatedTo--> Interest <--Synonym--> Involvement 