Concentration is a type of Increase. Explosion is a type of Increase. Explosion is a type of Band. Band is related to Stage. 
Currency is related to Pay. Pay is related to Attraction. 
Concentration --IsA--> Increase <--IsA-- Explosion --IsA--> Band <--RelatedTo--> Stage 
Currency <--RelatedTo--> Pay <--RelatedTo--> Attraction 