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": ""}
  Muhlenbergia  E_SA     ?Rmexicana   B6 POACEAE       United States  EDWARD G. VOSS `     Y/vv Muhlenbergia mexicana   1504 B     7r EDWARD G. VOSS  A TRACT OF 120 ACRS OF ALTERNATNG SAND RIDGES AND SHALLOW SWALES, IN WET WOODS IN SOUTHERN PART OF THE TRACT uV?    
{"catalogNumber": "", "order": "", "family": "Poaceae", "scientificName": "Muhlenbergia mexicana", "scientificNameAuthorship": "", "genus": "Muhlenbergia", "subgenus": "", "specificEpithet": "mexicana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "Edward G. Voss", "recordNumber": "1504", "verbatimEventDate": "", "habitat": "A tract of 120 acres of alternating sand ridges and shallow swales, in wet woods in southern part of the tract", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}