Civilization is related to Ancient. Ancient is the opposite of Young. 
Calendar is related to Event. Event is related to Stroke. Stroke is a synonym of Shot. Shot is a synonym of Shooting. 
Civilization <--RelatedTo--> Ancient <--Antonym--> Young 
Calendar <--RelatedTo--> Event <--RelatedTo--> Stroke <--Synonym--> Shot <--Synonym--> Shooting 