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": ""}
1645795 F   h D57 1940-06-21  l. b. smith, a. r. hodgdon :0(    S s.n.    qDVI VIRGINIA    +Ja~ l.    &t. URENS  $ UNITED STATES    CAaxh TRAGIA URENS     tragia SC7,   qQ 2 miles southwest of Sebrell Euphorbiaceae %0   DRY SANDY SOIL OF CLEARING IN PINE AND OAK WOODS gDCm  
{"catalogNumber": "1645795", "order": "", "family": "Euphorbiaceae", "scientificName": "Tragia urens", "scientificNameAuthorship": "L.", "genus": "Tragia", "subgenus": "", "specificEpithet": "urens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "L. B. Smith, A. R. Hodgdon", "recordNumber": "s.n.", "verbatimEventDate": "1940-06-21", "habitat": "Dry sandy soil of clearing in pine and oak woods", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Virginia", "county": "", "municipality": "", "locality": "2 miles southwest of Sebrell", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}