[{"Bold_text": "noun", "List Items": ["something that leads in or introduces; introduction; opening.", "Radio, Television.the connection between an a transmitter or receiving set.the portion of a program or script that precedes or introduces a commercial.", "the connection between an a transmitter or receiving set.", "the portion of a program or script that precedes or introduces a commercial."]}, {"Bold_text": "adjective", "List Items": ["(of a conductor) carrying input to an electric or electronic device or circuit, especially from an ."]}]