Era is related to Literature. Literature is related to British. British is a type of European. 
Meter is a synonym of Measure. Measure is related to Yard. Yard is related to Grass. 
Era <--RelatedTo--> Literature <--RelatedTo--> British --IsA--> European 
Meter <--Synonym--> Measure <--RelatedTo--> Yard <--RelatedTo--> Grass 