{
  "comments": {
    "new": "JASRAC ID: V-981023\n\nISBN: 4-04-910610-8\n\n(1M, 2M) is added, since a 3M2 matrix is known to exist.",
    "old": "JASRAC ID: V-981023\n\nISBN: 4-04-910610-8\n\n(1M, 2M) is added, since 3M2 matrix is known to exist."
  }
}