[{"Bold_text": "noun", "List Items": ["excavation and piling of earth connection with an engineering operation.", "Military.a construction formed chiefly of earth protection against enemy fire, used in both offensive and defensive operations.", "an artistic work consists of a large-scale alteration or modification of an area of land in a configuration designed by an artist or of an artist's installation, as in a museum or gallery, of soil, rock, or similar elemental materials."]}]