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": ""}
1947-08-28 (    x| : asteraceae  ` helianthus pauciflorus   x michigan  I pauciflorus UNITED STATES ;       k<F Prairie alomg NYC tracks    -84.26912 6u[   Xq) Jackso        0HJ a. a. reznicek  
{"catalogNumber": "", "order": "", "family": "Asteraceae", "scientificName": "Helianthus pauciflorus", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "pauciflorus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "A. A. Reznicek", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1947-08-28", "habitat": "Prairie along NYC tracks", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Jackson", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-84.26912", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}