So, in this country called Midwest Empire, large amounts of the population are slaves. About 1 in 5. The place slaves are most used is during 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. My question is, could they survive on this diet alone, or would they need to add an something extra to their food?