Depression is a type of Mood. Mood is related to Angry. you would Yell because Angry. 
Habitat is related to City. City is related to Community. Community is related to Family. you are likely to find Sibling in/at/on Family. 
Depression --IsA--> Mood <--RelatedTo--> Angry <--MotivatedByGoal-- Yell 
Habitat <--RelatedTo--> City <--RelatedTo--> Community <--RelatedTo--> Family <--AtLocation-- Sibling 