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": ""}
   !xl$6 1708261    VXu graile 1932-03-282 a:    nortb sumatra &S9S0       rahmat si toroes SIb;   LB8 RANTAU PRAPAT   %SYF LOPHATHERUM    1669 Oq_   poaceae      := lophatherum gracile
{"catalogNumber": "1708261", "order": "", "family": "Poaceae", "scientificName": "Lophatherum gracile", "scientificNameAuthorship": "", "genus": "Lophatherum", "subgenus": "", "specificEpithet": "gracile", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Rahmat Si Toroes", "recordNumber": "1669", "verbatimEventDate": "1932-03-28", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "North Sumatra", "county": "Rantau Prapat", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}