{
  "name": "PEAFWHN4",
  "label": "Demographics - past military service period of active duty",
  "predicateType": "int",
  "group": "N/A",
  "limit": 0,
  "suggested-weight": "MARSUPWT",
  "values": {
    "item": {
      "4": "Vietnam Era (August 1964 to April 1975)",
      "7": "January 1947 to June 1950",
      "2": "August 1990 to August 2001",
      "5": "February 1955 to July 1964",
      "8": "World War II (December 1941 to December 1946)",
      "6": "Korean War (July 1950 to January 1955)",
      "1": "September 2001 or later",
      "3": "May 1975 to July 1990",
      "-1": "NIU",
      "9": "November 1941 or earlier"
    }
  }
}