Dog is the opposite of Computer. you are likely to find Computer in/at/on Car. you are likely to find Car in/at/on Land. Land is related to Port. 
Plant is related to House. you are likely to find Jeans in/at/on House. 
Dog <--Antonym--> Computer --AtLocation--> Car --AtLocation--> Land <--RelatedTo--> Port 
Plant <--RelatedTo--> House <--AtLocation-- Jeans 