Discussion is related to People. Pocket is a type of People. Pocket is a synonym of Bunch. 
Refugee is a type of Civilian. Civilian is a different concept from Military. Military is related to Uniform. 
Discussion <--RelatedTo--> People <--IsA-- Pocket <--Synonym--> Bunch 
Refugee --IsA--> Civilian <--DistinctFrom--> Military <--RelatedTo--> Uniform 