Salt is related to Solid. Food is a type of Solid. Food is related to Market. Market is related to Shopping. 
Joint is a type of Cigarette. Cigarette is related to Tube. Tube is related to Rubber. 
Salt <--RelatedTo--> Solid <--IsA-- Food <--RelatedTo--> Market <--RelatedTo--> Shopping 
Joint --IsA--> Cigarette <--RelatedTo--> Tube <--RelatedTo--> Rubber 