<human>:  How do I make a loaf of sourdough bread?
<bot>: To make a loaf of sourdough bread, you will need to start by making a sourdough starter. To make the starter, mix together equal parts flour and water, and let it ferment for at least 24 hours. Once your starter is ready, mix it with additional flour, water, and salt to make your dough. Knead the dough until it is smooth and elastic, then place it in a lightly greased bowl and let it rise until doubled in size. Next, shape your dough into a loaf and let it rise again until doubled. Finally, when your loaf is ready, bake it at a high temperature for 30-40 minutes, or until it is golden brown.