In this country, large amounts of the population are slaves. About 1 in 5. Most are used in construction projects, like building walls and aqueducts. These slaves have 14 hour construction shifts, with 2 hours of mealtimes and 8 hours of sleep. At mealtimes, they are given the same three foods, potatoes beans and kale, mashed up with a glass of water to wash it down, and get sold meat and alcohol every last day of the month. My question is, could they survive on this diet alone, or would they need to add an something extra to their food?