Onion is the opposite of Garlic. Garlic is related to Italian. 
you are likely to find Garlic in/at/on Kitchen. Kitchen is related to Lunch. Lunch is related to Meal. 
Onion <--Antonym--> Garlic <--RelatedTo--> Italian 
Garlic --AtLocation--> Kitchen <--RelatedTo--> Lunch <--RelatedTo--> Meal 