Released in late 1971 (A Ballad of) A Peaceful Man was Gravy Train's second - and probably their most praised - album. Unlike their heavier debut this album sports some lovely string arrangements provided by Nick Harrison.A unique feature of the album is that it splits the heavy tracks from the lighter tracks: all the ballads are on side 1 while all the rockers are on side 2. 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