Human: I've heard that a healthy diet is essential for preventing cancer. What is the best diet to prevent cancer? Assistant: 
The best diet to prevent cancer is one that is rich in fruits and vegetables, whole grains, legumes, nuts, and seeds; low in red meat and processed meats; and moderate in alcohol intake. Additionally, it's important to include foods high in fiber, such as beans, lentils, and oats, which can help reduce your risk of developing certain cancers.