Ordinary is a different concept from Extra. Extra is related to Interest. Interest is related to Account. 
Gang is related to People. People is related to Government. Government is a synonym of Politics. 
Ordinary <--DistinctFrom--> Extra <--RelatedTo--> Interest <--RelatedTo--> Account 
Gang <--RelatedTo--> People <--RelatedTo--> Government <--Synonym--> Politics 