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": ""}
 i~ 1500952 1893-06-09 <EB    MG e united states      8QvU RETROFRACA s.n.  qR      B.x_2 BOECHERA BRASSICACEAE    (GRAHAM) Ã.LÃ¶VE & D.LÃ¶VE 6-   GRPM 43509       Boechera retrofracta  e +z  Grand Mesa     jND#| S.H. Camp & D.R. Camp Colorado ~ Q1   @h4 e delta   d#   2286 brassicales + 
{"catalogNumber": "1500952", "order": "Brassicales", "family": "Brassicaceae", "scientificName": "Boechera retrofracta", "scientificNameAuthorship": "(Graham) \u00c3\u0081.L\u00c3\u00b6ve & D.L\u00c3\u00b6ve", "genus": "Boechera", "subgenus": "", "specificEpithet": "retrofracta", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "S.H. Camp & D.R. Camp", "recordNumber": "s.n.", "verbatimEventDate": "1893-06-09", "habitat": "", "occurrenceRemarks": "GRPM 43509", "associatedTaxa": "", "country": "United States", "stateProvince": "Colorado", "county": "Delta", "municipality": "", "locality": "Grand Mesa", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "2286", "maximumElevationInMeters": ""}