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": ""}
  1507502 g`;N   FHO WashingtoNn, D. C. GA.J. PIETERS  r p   rwC Muhl.     &zr1 UNITED STATES    violac eae 1      7):N grpm 42761    TENELLA %|v     ^i& VIOLA    f VIOLA TENELLA 
{"catalogNumber": "1507502", "order": "", "family": "Violaceae", "scientificName": "Viola tenella", "scientificNameAuthorship": "Muhl.", "genus": "Viola", "subgenus": "", "specificEpithet": "tenella", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "A.J. Pieters", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "GRPM 42761", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Washington, D. C.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}