you are likely to find River in/at/on Continent. River is the opposite of Land. Land is related to Area. 
Church is a type of Perform. you would Perform because Actor. Actor is related to Pit. 
Continent <--AtLocation-- River <--Antonym--> Land <--RelatedTo--> Area 
Church --IsA--> Perform --MotivatedByGoal--> Actor <--RelatedTo--> Pit 