Pound is related to Weight. Weight is related to Diet. you are likely to find Grape in/at/on Diet. Grape is related to Purple. 
Meal is related to Salad. Salad is related to Green. 
Pound <--RelatedTo--> Weight <--RelatedTo--> Diet <--AtLocation-- Grape <--RelatedTo--> Purple 
Meal <--RelatedTo--> Salad <--RelatedTo--> Green 