Wood is related to Pine. Pine is a synonym of Pant. 
Shortage is a type of Event. Shortage is a synonym of Deficit. Deficit is related to Tax. Tax is related to Date. 
Wood <--RelatedTo--> Pine <--Synonym--> Pant 
Event <--IsA-- Shortage <--Synonym--> Deficit <--RelatedTo--> Tax <--RelatedTo--> Date 