Question: What is the middle name of the American singer songwriter who has been pushing the boundaries of lyrical content and visual imagery and who has worked with Tessa Watts, the English music video and film producer at Virgin Records and MTV?
Sentence (from "Madonna (entertainer)"): A leading presence during the emergence of MTV in the 1980s, Madonna is known for pushing the boundaries of lyrical content in mainstream popular music, as well as visual imagery in music videos and on stage.
Relevant evidence: Yes