Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Partikel II - Partikel II is a collaborative album by the noise musicians Merzbow and Nordvargr. The artists used each other's music as soundsources for their own works. It is the second part of the Partikel trilogy.
A:
Album