Log is a synonym of History. History is related to Work. Work is a synonym of Act. Interact is a type of Act. 
Star is related to Flag. Flag is related to Pole. Pole is related to South. South is a different concept from North. 
Log <--Synonym--> History <--RelatedTo--> Work <--Synonym--> Act <--IsA-- Interact 
Star <--RelatedTo--> Flag <--RelatedTo--> Pole <--RelatedTo--> South <--DistinctFrom--> North 