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": ""}
1941-09-04       7Xa4y 1283929    Qw%^ sand lake    /Ji5 b. walker   42.046819  Zo   0 RIGIDA PURSH 7q   G SAGITTARIA   ALISMATAC3AE q^  lenawee M    %?UNE Sagittaria rigida  [!k. rataj 1968] Q?    -84.135784 m0!2   
{"catalogNumber": "1283929", "order": "", "family": "Alismataceae", "scientificName": "Sagittaria rigida", "scientificNameAuthorship": "Pursh", "genus": "Sagittaria", "subgenus": "", "specificEpithet": "rigida", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "B. Walker", "recordNumber": "", "verbatimEventDate": "1941-09-04", "habitat": "", "occurrenceRemarks": "[!K. Rataj 1968]", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Lenawee", "municipality": "", "locality": "Sand Lake", "decimalLatitude": "42.046819", "decimalLongitude": "-84.135784", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}