context: Juan I Mad (Spanish: Juana I la Loca, Joanna Mad, November 6, 1479, Toledo, Spain - April 12, 1555, Tordesillas, Spain) - Queen of Castile from November 27, 1504, nominally - until her death in 1555. The wife of the Duke of Burgundy Philip the Beautiful, after his death, is believed to have lost her mind and was imprisoned in the monastery, and her father and eldest son ruled for her.
question: What was the name of the husband of Juana Mad?
answers.text: Philip the Beautiful