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": ""}
            xR*1m CAREX IGNOTA       OVACHITA NATION4L FOREST, 1.0 MI E ON USFR 106 FROM BAIRD SPRINGS SHELTER AEA. ?b=B    I@GMx United States  7=* trs: t4s r28w seg 21 1993-05-18  2LUo     
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Carex ignota", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1993-05-18", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Ouachita National Forest, 1.0 mi E on USFR 106 from Baird Springs Shelter Area.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "TRS: T4S R28W sec 21", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}