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": ""}
 NIGRA d$e   qP E EAST KHASI HILLS nees ex steud.   ,;^    7538 et8    f INDIA Poaceae P   * eragrostis nigra THAKUR RUP CHAND  5  1486683 a@     1951-04-15 -u   poales  !Px5   ERAGROSTIS K   > Me  Meghalaya   p OLD FIELD   kL &R 1676 
{"catalogNumber": "1486683", "order": "Poales", "family": "Poaceae", "scientificName": "Eragrostis nigra", "scientificNameAuthorship": "Nees ex Steud.", "genus": "Eragrostis", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Thakur Rup Chand", "recordNumber": "7538", "verbatimEventDate": "1951-04-15", "habitat": "Old field", "occurrenceRemarks": "", "associatedTaxa": "", "country": "India", "stateProvince": "Meghalaya", "county": "East Khasi Hills", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "1676", "maximumElevationInMeters": ""}