Salt is related to Dry. Dry is related to Fly. Fly is a type of Opening. 
Base is related to Foot. Foot is related to Lower. Lower is the opposite of Lady. you are likely to find Lady in/at/on City. 
Salt <--RelatedTo--> Dry <--RelatedTo--> Fly --IsA--> Opening 
Base <--RelatedTo--> Foot <--RelatedTo--> Lower <--Antonym--> Lady --AtLocation--> City 