[{"Bold_text": "noun", "List Items": ["a republic in NW Africa: formerly part of French West Africa. 458,976 sq. mi. (1,188,748 sq. km).:Niamey.", "a river in W Africa, rising in S Guinea, flowing NE through Mali, and then SE through Nigeria into the Gulf of Guinea. 2,600 miles (4,185 km) long."]}]