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": ""}
      7r trisulca   >4J  malcolm e. mcdonald  2h-= 1474388   /*m LEMNA  5224 p>~fj     go IN DENSE CAT-TA6IL STAND. 1949-09-04 FWa    O l.   _ araceae  [Small] k     D Alismatales  
{"catalogNumber": "1474388", "order": "Alismatales", "family": "Araceae", "scientificName": "", "scientificNameAuthorship": "L.", "genus": "Lemna", "subgenus": "", "specificEpithet": "trisulca", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Malcolm E. McDonald", "recordNumber": "5224", "verbatimEventDate": "1949-09-04", "habitat": "In dense cat-tail stand.", "occurrenceRemarks": "[Small]", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}