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": ""}
 1906-07-20 O   u/Ul) 46.543544  @kJL 1256931   u MICHIGAN   a w& asteraceae   cTk9? UNITED STATES gigantea ]bw    marquet7e ss   HzJt -b87.395417  E,vX2 SOLIDAGaO  ])4qQ Marquette  OA xc AITON   k  a. dachnowski  W: SOLIDAGO GIGANTEA     |i  Ast3rales  SANDY SOIL, EXPOSED; ALONG RAILROAD ]3n7 
{"catalogNumber": "1256931", "order": "Asterales", "family": "Asteraceae", "scientificName": "Solidago gigantea", "scientificNameAuthorship": "Aiton", "genus": "Solidago", "subgenus": "", "specificEpithet": "gigantea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "A. Dachnowski", "recordNumber": "", "verbatimEventDate": "1906-07-20", "habitat": "Sandy soil, exposed; along railroad", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Marquette", "municipality": "", "locality": "Marquette", "decimalLatitude": "46.543544", "decimalLongitude": "-87.395417", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}