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": ""}
   :lf4 1936-10-08 1646928 m  ASAHAN CLb          Arundina *b$g)      / graminifolia     >4 subOsp.  : AEK GAROENGGANG, (REGION OF THE ASAHAN-TOBA BOUNDARY, EAST OF DOLOK SI MANOEK-MANOEK)    
{"catalogNumber": "1646928", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "Arundina", "subgenus": "", "specificEpithet": "graminifolia", "verbatimTaxonRank": "subsp.", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1936-10-08", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Asahan", "municipality": "", "locality": "Aek Garoenggang, (region of the Asahan-Toba boundary, east of Dolok Si Manoek-manoek)", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}