Straighten is a type of Arrange. Arrange is a type of Compose. 
Economy is related to Country. Country is related to Mass. Mass is a synonym of Crowd. Crowd is related to Full. 
Straighten --IsA--> Arrange --IsA--> Compose 
Economy <--RelatedTo--> Country <--RelatedTo--> Mass <--Synonym--> Crowd <--RelatedTo--> Full 