What is the fine-grained topic of the following text: Some of the potassium rich foods include bananas, apricots, avocado, oranges, strawberries, tomatoes, potatoes, chard, cauliflower, cabbage, cucumber, crimini mushrooms, turmeric, bell pepper, squash, eggplant, Brussels sprouts, spinach, parsley, tuna, broccoli, halibut, dates, melons, Lima beans, pears, peanuts, raisins, prunes, yogurt and milk. Only return the topic.
Potassium-rich foods