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": ""}
  b@ UNITED STATES  8a achoreum  39-59 8Bhu(  Polygonaceae NLR:   SPINK .7w#P   R POLYGONUM        v  1439656  8 S. F. BLAKE  fev,  polygonum achoreum  jacob f. brenckle k     CONTACT UM HERBARIUM     *= South Dakota caryophyllales  Q68  
{"catalogNumber": "1439656", "order": "Caryophyllales", "family": "Polygonaceae", "scientificName": "Polygonum achoreum", "scientificNameAuthorship": "S. F. Blake", "genus": "Polygonum", "subgenus": "", "specificEpithet": "achoreum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Jacob F. Brenckle", "recordNumber": "39-59", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "South Dakota", "county": "Spink", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}