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": ""}
  %a 1921-08-07     ; 45.43839       B% 1708    EUTROCHIUM MACULATUM VAR. MACULATUM UMf   h~7 eutrochium         eK4 maculatum    M| -84.7863
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Eutrochium maculatum var. maculatum", "scientificNameAuthorship": "", "genus": "Eutrochium", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "maculatum", "identifiedBy": "", "recordedBy": "", "recordNumber": "1708", "verbatimEventDate": "1921-08-07", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "45.43839", "decimalLongitude": "-84.7863", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}