this is the main purpose of the definition of the symbol classes. later he said "while not all artists are chess players, all chess players are artists." my voice sounded very young on that one." little is known of its operations there, but its primary role during this time was air defense. players continue throwing balls in order to get the highest score. the song returned to their rotation in 1976, and was played about 80 more times before being retired in 1987. live recordings from both periods have been released. the first class had 25 cadets. 