Question: Torben Ulrich is a Danish writer, musician, filmmaker, painter, director, performer and former amateur then professional tennis player, and the father of Metallica drummer Lars Ulrich, a Danish musician, songwriter, actor, and record producer, he is best known as the drummer and co-founder of which American heavy metal band ?
Facts:
Torben Ulrich is the father of Lars Ulrich
Lars Ulrich is best known as the drummer and co-founder of Metallica
Metallica is the American heavy metal band
Answer: Metallica