Plunge can cause/lead to Steep. Plunge is related to Swimming. Swimming can cause/lead to Drown. Drown is a type of Be. 
Upset is related to Depression. Depression is related to Cry. Cry is related to Expression. Expression is related to Frown. 
Steep <--Causes-- Plunge <--RelatedTo--> Swimming --Causes--> Drown --IsA--> Be 
Upset <--RelatedTo--> Depression <--RelatedTo--> Cry <--RelatedTo--> Expression <--RelatedTo--> Frown 