What is the fine-grained topic of the following text: Half the carbs of 2 slices of 100% whole wheat bread (1 flatout light Italian Herb [53 g] = 90 calories & 14 g carbohydrates 2 slices [86 g] of whole wheat bread = 200 calories & 39 g carbohydrates). Only return the topic.
Comparison of carb content between Flatout Light Italian Herb and whole wheat bread