Focus II (re-released as Moving Waves) is the second studio album from the Dutch rock band Focus. The album includes the hit Hocus Pocus and Eruption a 23-minute adaptation of Jacopo Peri's opera Euridice which tells the story of Orpheus and Euridice. Focus II was released in October 1971 to positive critical reception. It went on to reach the top ten in the UK US and the Netherlands. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Album