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": ""}
   ) PERGULARIA EXTENSA dhaka n  PERGULARIA R4bJ  Gentianales      extensa zzY :    <YJ~5 (JACQ.) N. E. BR. dhaka 5 B ]  Walter N. Koelz ~nwe   i 8q BANGLADESH   1521607  TQK   9J APOCYNACEAE     [ Dacca, Bengal   tS]   10691   thicket 5#  1937-01-15 KoQ=H  
{"catalogNumber": "1521607", "order": "Gentianales", "family": "Apocynaceae", "scientificName": "Pergularia extensa", "scientificNameAuthorship": "(Jacq.) N. E. Br.", "genus": "Pergularia", "subgenus": "", "specificEpithet": "extensa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Walter N. Koelz", "recordNumber": "10691", "verbatimEventDate": "1937-01-15", "habitat": "Thicket", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Bangladesh", "stateProvince": "Dhaka", "county": "Dhaka", "municipality": "", "locality": "Dacca, Bengal", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}