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": ""}
  1939-04-04 m+1      E  Rhododendon canescens  Pine forest H@~  RHODODENDRON B;;    ,w vicinity of brunswick  D GEORGIA  canescens 4 |w   13%461 >9 f  WALTER N. KOELZ d     1509204 RX:    Km UNITED STATES glynn y9Sim   ericaceae T 61    8381  (michx.) sweet 
{"catalogNumber": "1509204", "order": "", "family": "Ericaceae", "scientificName": "Rhododendron canescens", "scientificNameAuthorship": "(Michx.) Sweet", "genus": "Rhododendron", "subgenus": "", "specificEpithet": "canescens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Walter N. Koelz", "recordNumber": "13461", "verbatimEventDate": "1939-04-04", "habitat": "Pine forest", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Georgia", "county": "Glynn", "municipality": "", "locality": "Vicinity of Brunswick", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}