Alien is a synonym of Foreigner. Foreigner is related to Illegal. Illegal is a synonym of Sharp. Sharp is related to Glass. 
Culture is related to Music. Music is related to Best. Best is a different concept from Average. 
Alien <--Synonym--> Foreigner <--RelatedTo--> Illegal <--Synonym--> Sharp <--RelatedTo--> Glass 
Culture <--RelatedTo--> Music <--RelatedTo--> Best <--DistinctFrom--> Average 