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": ""}
    6464 j2   : MIDLAND  43.671654 <   1929-06-23 0 x        -84.440402 VkT   .nDis spithamaea  5<&(i 3 mi. w. of Sanford  CALYSTEGIA  K_tu    $SOLANALES Calystegia spithamaea K+,H#     `.+ Michigan  2V SANDY BANK, ROADSIDE
{"catalogNumber": "", "order": "Solanales", "family": "", "scientificName": "Calystegia spithamaea", "scientificNameAuthorship": "", "genus": "Calystegia", "subgenus": "", "specificEpithet": "spithamaea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "6464", "verbatimEventDate": "1929-06-23", "habitat": "Sandy bank, roadside", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Midland", "municipality": "", "locality": "3 mi. w. of Sanford", "decimalLatitude": "43.671654", "decimalLongitude": "-84.440402", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}