[{"Bold_text": "noun", "List Items": ["an enclosing framework on casters or wheels for supporting a baby who is learning to walk.", "a similar mobility aid, usually a waist-high four-legged framework of lightweight metal, for support or balance while walking.", "Usually Walker.Informal. Walker hound Walker hound.", "a person or thing that walks or likes to walk:He's a great walker.", "Theater Slang.an extra or supernumerary.", "Slang.a musician required by a union contract to be hired and paid full salary even when not needed for performance."]}, {"Bold_text": "noun", "List Items": ["Alice,born 1944,U.S. novelist and short-story writer.", "David,1785–1830,U.S. abolitionist.", "James John Jimmy,1881–1946,U.S. politician: mayor of New York City 1926–32.", "John,born 1952,New Zealand track-and-field athlete.", "Sarah Breed·love[breed, -luhv],1867–1919,U.S. businesswoman and philanthropist.", "a city in W Michigan.", "a male given name."]}]