anchor.diff:          "seq_no": 1403,
           "code": 511,
           "title": "Publishing Industries (except Internet)",
  -        "change_indicator": 0,
           "trilateral": 1
       },
       {
           "seq_no": 1404,
           "code": 5111,
           "title": "Newspaper, Periodical, Book, and Directory Publishers",
  -        "change_indicator": 0,
           "trilateral": 1
       },
       {
           "seq_no": 1405,
           "code": 51111,
           "title": "Newspaper Publishers",
  -        "change_indicator": 0,
           "trilateral": 1
       },
       {
           "seq_no": 1406,
           "code": 511110,
           "title": "Newspaper Publishers",
  -        "change_indicator": 0,
  -        "trilateral": 0
       },
       {
           "seq_no": 1407,
           "code": 51112,
           "title": "Periodical Publishers",
  -        "change_indicator": 0,
           "trilateral": 1
       },
       {
           "seq_no": 1408,
           "code": 511120,
           "title": "Periodical Publishers",
  -        "change_indicator": 0,
  -        "trilateral": 0
       },
       {  ...  }
   ]
  
positive.code:         "seq_no": 1402,
          "code": 51,
          "title": "Information",
          "change_indicator": 0,
          "trilateral": 1
      },
      {
          "seq_no": 1470,
          "code": 519,
          "title": "Other Information Services",
          "change_indicator": 0,
          "trilateral": 1
      },
      {
          "seq_no": 1471,
          "code": 5191,
          "title": "Other Information Services",
          "change_indicator": 0,
          "trilateral": 1
      },
      {
          "seq_no": 1474,
          "code": 51912,
          "title": "Libraries and Archives",
          "change_indicator": 0,
          "trilateral": 1
      }
  ]
negative.code:         "seq_no": 1402,
          "code": 51,
          "title": "Information",
          "trilateral": 1
      },
      {
          "seq_no": 1470,
          "code": 519,
          "title": "Other Information Services",
          "trilateral": 1
      },
      {
          "seq_no": 1471,
          "code": 5191,
          "title": "Other Information Services",
          "trilateral": 1
      },
      {
          "seq_no": 1474,
          "code": 51912,
          "title": "Libraries and Archives",
          "trilateral": 1
      }
  ]
  