song_library.rb

def full_library
  {
    :"U2" => {
      :albums => {
        :"The Joshua Tree" => {
          :songs => ["With or Without You", "Still Haven't Found What I'm Looking For", "Bullet the Blue Sky"]
        },
        :"Zooropa" => {
          :songs => ["Numb"]
        }
       }
    },
    :"Talking Heads" => {
      :albums => {
        :"Fear of Music" => {
          :songs => ["Life During Wartime", "Heaven"]
        },
        :"Speaking in Tongues" => {
          :songs => ["This Must Be the Place (Naive Melody)", "Burning Down the House"]
        }
      }
    },
    :"Huey Lewis and the News" => {
      :albums => {
        :"Sports" => {
          :songs => ["I Want a New Drug", "If This is It", "Heart of Rock and Roll"]
        }
      }
    }
  }
end