user: What are the health benefits of walking for exercise?

assistant: Walking daily, as little as 30 minutes a day, provides several physical and mental benefits.  It can lower stress, is beneficial for the mind and reduces several health risks.

user: What are some common types of lettuce used in salad and other dishes?

assistant: Common types of lettuce used in salads and other dishes include iceberg lettuce, butter lettuce, red leaf lettuce, green lettuce, frisee, endive, escarole, arugula, spring mix, and baby kale.

user: Which years was the Tour de France not raced?

assistant: The Tour was not contested in 1915, 1916, 1917 and 1918 due to World War 1. It was again postponed from 1940 through 1945 due to World War 2.