Sight is related to Fog. Fog is related to Smoke. Smoke is related to Light. 
Garlic is the opposite of Onion. Onion is related to Vegetable. Pepper is a type of Vegetable. Pepper is related to Companion. 
Sight <--RelatedTo--> Fog <--RelatedTo--> Smoke <--RelatedTo--> Light 
Garlic <--Antonym--> Onion <--RelatedTo--> Vegetable <--IsA-- Pepper <--RelatedTo--> Companion 