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": ""}
    zx Richland  SOUTH CAROLINA gV3      john b. nelson cvSv   Q; u 1992-05-28     B/H# ASPARAGALES    ;  on unmowed street edge with paspalum dilatatum SPIRANTHES :=HYV      1654730 A7o    
{"catalogNumber": "1654730", "order": "Asparagales", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "Spiranthes", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John B. Nelson", "recordNumber": "", "verbatimEventDate": "1992-05-28", "habitat": "On unmowed street edge with Paspalum dilatatum", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "South Carolina", "county": "Richland", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}