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": ""}
  R$ >: 1506517    cJ5/ Ziziphus rotundifolia   1949-11-23 T    ._/ Bamanigaon    <=^% rotundifolia    T INDIA  /+9w assam  y  THAKUR RUP CHAND in open hedge /x   g ROSALES    rhamnaceae 2506 5@  KAMRUP Ju   = ziziphus   (Pers.) Roth -  
{"catalogNumber": "1506517", "order": "Rosales", "family": "Rhamnaceae", "scientificName": "Ziziphus rotundifolia", "scientificNameAuthorship": "(Pers.) Roth", "genus": "Ziziphus", "subgenus": "", "specificEpithet": "rotundifolia", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Thakur Rup Chand", "recordNumber": "2506", "verbatimEventDate": "1949-11-23", "habitat": "In open hedge", "occurrenceRemarks": "", "associatedTaxa": "", "country": "India", "stateProvince": "Assam", "county": "Kamrup", "municipality": "", "locality": "Bamanigaon", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}