Sad is related to Emotion. Emotion is related to Shock. Shock is a synonym of Blow. Blow is related to Breath. 
Dad is related to Family. Family is related to Organization. 
Sad <--RelatedTo--> Emotion <--RelatedTo--> Shock <--Synonym--> Blow <--RelatedTo--> Breath 
Dad <--RelatedTo--> Family <--RelatedTo--> Organization 