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": ""}
   Ar8m Araceae      1663245 L u   Ewda; lemna    EM$)e 1948-08-12 E. Landolt #        %f  FORMING COMLETE COVER ON DITCHES. LEAVES PLUMP, WITH AIR-FILLED CELLS BELOW  @Z ixmiquilpan  k= ^W H. E. MOORE    4510 9+[   
{"catalogNumber": "1663245", "order": "", "family": "Araceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Lemna", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "E. Landolt", "recordedBy": "H. E. Moore", "recordNumber": "4510", "verbatimEventDate": "1948-08-12", "habitat": "", "occurrenceRemarks": "Forming complete cover on ditches. Leaves plump, with air-filled cells below", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Ixmiquilpan", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}