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": ""}
 emersum R    r1X-a S.N.  rehmann  6u   126942+4 r(  SPARGANIUM yf   TYPHACEAE k*U&m   :$K poales 19o05-10-25 Rx  Shallow pond +xHO*    #vZz michigan  c united states  IO washtenaw  :- 2-1/2 miles sw of campus  CHARLES A. DAVIS          
{"catalogNumber": "1269424", "order": "Poales", "family": "Typhaceae", "scientificName": "", "scientificNameAuthorship": "Rehmann", "genus": "Sparganium", "subgenus": "", "specificEpithet": "emersum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Charles A. Davis", "recordNumber": "s.n.", "verbatimEventDate": "1905-10-25", "habitat": "Shallow pond", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Washtenaw", "municipality": "", "locality": "2-1/2 miles SW of Campus", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}