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": ""}
      Lb+ R. BR. CAREX $mHb)     above canyon on horsethief creek 10 1/2 miles west of wilmer, west of rocky mtn. trench. M 8K-   687 M__  CANADA D`l  Carex concinna ?    1958-05-21 x>           
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Carex concinna", "scientificNameAuthorship": "R. Br.", "genus": "Carex", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "687", "verbatimEventDate": "1958-05-21", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "", "county": "", "municipality": "", "locality": "Above canyon on Horsethief Creek 10 1/2 miles west of Wilmer, west of Rocky Mtn. Trench.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}