[{"Bold_text": "noun", "List Items": ["fermented dough from one baking and used as leaven, rather than fresh yeast, to start the next.", "bread leavened with this fermented dough:Pick up a loaf of sourdough and a baguette, too.", "a prospector or pioneer, especially in Alaska or Canada.", "any longtime resident, especially in Alaska or Canada."]}, {"Bold_text": "adjective", "List Items": ["leavened with sourdough:sourdough bread."]}]