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": ""}
John H. Ehlers 7Kn)     oleaceae aw@     4527 mackinac `   United States 4l     q d une region between brevort lake and lak e michigan    ` michigan   . Fraxinus nigra NIGRA sm$o  w:ooded swamp. B29=l  1929-09-12     1174983 r    o 46.018899  ,mHs edward g. voss -85.041733 JSsx7    
{"catalogNumber": "1174983", "order": "", "family": "Oleaceae", "scientificName": "Fraxinus nigra", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "John H. Ehlers", "recordNumber": "4527", "verbatimEventDate": "1929-09-12", "habitat": "Wooded swamp.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Mackinac", "municipality": "", "locality": "Dune region between Brevort Lake and Lake Michigan", "decimalLatitude": "46.018899", "decimalLongitude": "-85.041733", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}