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": ""}
 16649 R   F_  1947-06-23  .n Malpighiales   1157483 ^ w   CHIAPAS %   Nt  Caperonia palustris   Ob MEXICO  euphorbiaceae ,!YM         in wet grassy field     PtNv  nandolopez   palustris ++  
{"catalogNumber": "1157483", "order": "Malpighiales", "family": "Euphorbiaceae", "scientificName": "Caperonia palustris", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "palustris", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "16649", "verbatimEventDate": "1947-06-23", "habitat": "In wet grassy field", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "Chiapas", "county": "", "municipality": "", "locality": "Nandolopez", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}