Mild is related to Surprise. Surprise is related to Excitement. 
Salt is related to Foot. Foot is related to Human. Human is related to Breathing. Breathing requires Lung. 
Mild <--RelatedTo--> Surprise <--RelatedTo--> Excitement 
Salt <--RelatedTo--> Foot <--RelatedTo--> Human <--RelatedTo--> Breathing --HasPrerequisite--> Lung 