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": ""}
  (~^  1907-10     melanoc4rpus +qfC   Ff2l@ FLORIDA Poaceae  H   agnes chase s    *je| united states   (elliott) benth. 6Jrs  HETEROPOGON MELANOCARPUS DW<   1415821 58R?   Heteropogon w)!        
{"catalogNumber": "1415821", "order": "", "family": "Poaceae", "scientificName": "Heteropogon melanocarpus", "scientificNameAuthorship": "(Elliott) Benth.", "genus": "Heteropogon", "subgenus": "", "specificEpithet": "melanocarpus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Agnes Chase", "recordNumber": "", "verbatimEventDate": "1907-10", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Florida", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}