{
  "id": "UN130",
  "name": "foot (U.S. survey)",
  "ml_name": "ip_ft_{US}",
  "symbol": "ft",
  "reference": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8#F"
}