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": ""}
  pumila  >   ^ Betula pumila     ?^-xt 5753  R XH JOHN H. EHLERS   Livingston      On island of marl pebbles. i0p    4)  BETULACEAE   1934-09-30 P*^t   JL* -83.86186  Fagales 0 RC      Michigan 5B5 
{"catalogNumber": "", "order": "Fagales", "family": "Betulaceae", "scientificName": "Betula pumila", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "pumila", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John H. Ehlers", "recordNumber": "5753", "verbatimEventDate": "1934-09-30", "habitat": "On island of marl pebbles.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Livingston", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-83.86186", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}