anchor.diff:  unknown,Dreamhouse
   unknown,Dreams of the Muse
   "Solis, Octavio",El Paso Blue
  -unknown,Emma's Child
  +"Thatcher, Kristine",Emma's Child
   unknown,Enrico IV
   unknown,Enter the Guardsmen
   "Cain, Bill",Equivocation
  
positive.code: unknown,Ballerina
  "Coward, Noël",Blithe Spirit
  unknown,Blood Wedding
  unknown,Blues for an Alabama Sky
  unknown,Born Yesterday
  unknown,Boy Meets Girl
  unknown,Brand
  unknown,"Breakfast, Lunch & Dinner"
  unknown,Breaking the Silence
  unknown,Broadway
  unknown,Bus Stop
  "Schenkkan, Robert",By the Waters of Babylon
  unknown,Cabaret Verboten
  "Williams, Tennessee",Cat on a Hot Tin Roof
  unknown,Charley's Aunt
  unknown,Chicago
  
negative.code: unknown,The Wild Duck
  unknown,This Day and Age
  unknown,Three Musketeers
  "Chekhov, Anton",Three Sisters
  unknown,Threepenny Opera
  unknown,Throne of Blood
  unknown,Tis Pity She's a Whore
  