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": ""}
  $c Vietnam POTABILIS 2D`6    V euphorbiaceae     / J. Clemens & M. S. Clemens   ~M DA NANG      malpighiales _9z  3842 a_~mS   J SOUTH CENTRAL   Croton h   O)   1542991   Small tree in forest lvc$5  
{"catalogNumber": "1542991", "order": "Malpighiales", "family": "Euphorbiaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Croton", "subgenus": "", "specificEpithet": "potabilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "J. Clemens & M. S. Clemens", "recordNumber": "3842", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "Small tree in forest", "associatedTaxa": "", "country": "Vietnam", "stateProvince": "South Central", "county": "Da Nang", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}