sentences: apple / symbols are a mean of poison & fast apple / yards can prevent magnetism ->  eating a kind of food can prevent scurvy  eating a kind of food can prevent scurvy & glycogen is a mean of health ->  eating a kind of food can prevent a disease  eating a kind of food can prevent a disease & fast / obstacles is when an attacks imperial in strike from poison into itself by fast ->  taking in nutrients by eating a kind of food can prevent a disease  taking in nutrients by eating a kind of food can prevent a disease & if something can prevent a something else then that something else is probably caused by a excess of that something -> if a disease can be prevented by eating a certain kind of food then that disease is probably caused by a nutritional deficiency