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": ""}
 xu CAREX cotact um herbarium u a ?     b CAROLINIANA  wH    Texas   8 HARDIN  h Carex caroliniana   3666 &     |,F cyperaceae   poales + -     2006-04-14  b  1459259 gXo  United States L K      David J. Rosen z.IS   VdOX5 schwein. 
{"catalogNumber": "1459259", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex caroliniana", "scientificNameAuthorship": "Schwein.", "genus": "Carex", "subgenus": "", "specificEpithet": "caroliniana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "David J. Rosen", "recordNumber": "3666", "verbatimEventDate": "2006-04-14", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Texas", "county": "Hardin", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}