anchor.diff:  "Song","Rock and Roll Music"
   "Song","I'll Follow the Sun"
   "Song","Mr. Moonlight (song)"
  -"Song","Kansas City (Jerry Leiber and Mike Stoller song)"
  +"Song","Kansas City (Leiber and Stoller song)"
   "Song","Hey-Hey-Hey-Hey!"
   "Song","Eight Days a Week"
   "Song","Words of Love"
   "Song","Honey Don't"
  -"Song","Every Little Thing (song)"
  +"Song","Every Little Thing (Beatles song)"
   "Song","I Don't Want to Spoil the Party"
   "Song","What You're Doing"
   "Song","Everybody's Trying to Be My Baby"
  
positive.code: "Person","Allan Williams"
  "Group","The Quarrymen"
  "Album","Please Please Me"
  "Album","With The Beatles"
  "Album","Introducing... The Beatles"
  "Album","Meet the Beatles!"
  "Album","The Beatles' Second Album"
  
negative.code: "Song","Savoy Truffle"
  "Song","Cry Baby Cry"
  "Song","Revolution 9"
  "Song","Good Night (Beatles song)"
  "Song","Only a Northern Song"
  "Song","All Together Now"
  "Song","Hey Bulldog"
  