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": ""}
1950-06-16 2*% =      I,g INDIA       R 1537507 3204 xF_         e acmella calva   6X8 Kohima   i&. Nagaland  CALVA e  Asterales S,   |t,S. kohima, naga hills 
{"catalogNumber": "1537507", "order": "Asterales", "family": "", "scientificName": "Acmella calva", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "calva", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "3204", "verbatimEventDate": "1950-06-16", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "India", "stateProvince": "Nagaland", "county": "Kohima", "municipality": "", "locality": "Kohima, Naga Hills", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}