(query-loop)  ; starts a session with the database
     
     (who was the director of amarcord)  ; query
     (federico fellini)               ; response
     
     (who were the actors in the big easy) 
     ((dennis quaid)
      (ellen barkin)
      (ned beatty)                    
      (lisa jane persky)
      (john goodman)
      (charles ludlam))
     
     (what movies were made in 1991)
     ((boyz n the hood) (dead again))
     
     (what movies were made between 1985 and 1990)
     ((the big easy))
     
     (what movies were made in 1921)
     (i do not know)           ; no answers found
     
     (why is the sky blue)
     (i do not understand) ; query not recognized
     
     (so long)              ; ends session
     (see you later)