Block is related to Corner. Corner is related to Square. Square is related to Brick. Brick is a type of Insect. 
Depression can cause/lead to Suicide. Depression is a type of Crisis. Crisis is a type of Situation. 
Block <--RelatedTo--> Corner <--RelatedTo--> Square <--RelatedTo--> Brick --IsA--> Insect 
Suicide <--Causes-- Depression --IsA--> Crisis --IsA--> Situation 