#tempo  (music) the speed at which a composition is to be played
  supertype:  #musical_time__musicaltime  the beat of musical rhythm
  subtype:  #accelerando  a gradually increasing tempo of music; "my ear will not accept such violent accelerandos"
  subtype:  #allegretto  a quicker tempo than andante but not as fast as allegro
  subtype:  #allegro.tempo  a brisk and lively tempo
     subtype:  #allegro_con_spirito__allegroconspirito  lively with spirit
  subtype:  #andante  a moderately slow tempo (a walking pace)
  subtype:  #meno_mosso  to be played at reduced speed; less rapid

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