Refactor the unstructured text into a valid JSON dictionary. The key names follow the Darwin Core Archive Standard. If a key lacks content, then insert an empty string. Fill in the following JSON structure as required: {"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}
  nUn united states    X; St. Louis  gzT 410  1438263 +5nR[    Heinrich K.D. Eggert -!    2 dysphania ambrosioides   DYSPHANIA nJ  missouri      ambrosioides nh),   (L.) MOSYKIN & CLEMANTS c dG#     $B Gamaranthaceae   uG caryophyllales  W contact um herbarium
{"catalogNumber": "1438263", "order": "Caryophyllales", "family": "Amaranthaceae", "scientificName": "Dysphania ambrosioides", "scientificNameAuthorship": "(L.) Mosyakin & Clemants", "genus": "Dysphania", "subgenus": "", "specificEpithet": "ambrosioides", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Heinrich K.D. Eggert", "recordNumber": "410", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Missouri", "county": "St. Louis", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}