[{"Bold_text": "noun", "List Items": ["Baseball.either of the two top-tier baseball leagues (the American League American Leagueand the National League National League) that are organized under and regulated by MLB.", "Sports.a league of corresponding stature in certain other sports, such as ice hockey, soccer, football, or basketball."]}, {"Bold_text": "adjective", "List Items": ["Sports.of or relating to the major leagues major leagues,especially in baseball.", "Informal.belonging to or among the best or most important of its kind:a major-league orchestra."]}]