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": ""}
  ?rk4C 1186538 1998-06-19 M21    [| michael j. oldham   GARBERI N jH;   CYPERACEAE      UTM 430010, MAP 42D/16, SQUARE 16EK40 McSH  POALES Fc       CG-F CANADA  CAAEX GARBERI %nKg  LOCALLY COMMON ON DRY, OPEN SANDY GROUND NEAR RAILWAY TRACKS. !oN     %qi 20710   
{"catalogNumber": "1186538", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex garberi", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "garberi", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Michael J. Oldham", "recordNumber": "20710", "verbatimEventDate": "1998-06-19", "habitat": "locally common on dry, open sandy ground near railway tracks.", "occurrenceRemarks": "UTM 430010, map 42D/16, square 16EK40", "associatedTaxa": "", "country": "Canada", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}