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": ""}
   1520746 Dr:  Mawryngkneng s].f      w-n Achyrospermum densiflorum  meghalaya x    Lamiales GH+^  densiflorum =d     el9[  4818   +o__[  blume    Achyrospermum KztZ   ]f THAKUR RUP CHAND  
{"catalogNumber": "1520746", "order": "Lamiales", "family": "", "scientificName": "Achyrospermum densiflorum", "scientificNameAuthorship": "Blume", "genus": "Achyrospermum", "subgenus": "", "specificEpithet": "densiflorum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Thakur Rup Chand", "recordNumber": "4818", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Meghalaya", "county": "", "municipality": "", "locality": "Mawryngkneng", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}