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": ""}
  $Rm 8 wet places    4p/& ludwigia ludwigia palustris 8  John Samples k&XGO    6 1838-07-06   -LA W (l.) elliott  | X onagraceae  Urbana      1V UNITED STATES   | Yl s.n.    Gc4 MYRTALES  xW-s palustris  1508747 i  Ohio ?.  CHAMPAIGN 6  
{"catalogNumber": "1508747", "order": "Myrtales", "family": "Onagraceae", "scientificName": "Ludwigia palustris", "scientificNameAuthorship": "(L.) Elliott", "genus": "Ludwigia", "subgenus": "", "specificEpithet": "palustris", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John Samples", "recordNumber": "s.n.", "verbatimEventDate": "1838-07-06", "habitat": "Wet places", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Ohio", "county": "Champaign", "municipality": "", "locality": "Urbana", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}