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": ""}
   t lu 1948-09-19 muhlenbergia rigida Dm+      VZNn@ Howard S. Gentry   N , (kunth) kunth  IS K% CONTACT UM HERBARIUM    lj^rD Mexico    rigida t5R      ;q! y MUHLENBERGIA  poales Y 9    JASON R. SWALLEN n  
{"catalogNumber": "", "order": "Poales", "family": "", "scientificName": "Muhlenbergia rigida", "scientificNameAuthorship": "(Kunth) Kunth", "genus": "Muhlenbergia", "subgenus": "", "specificEpithet": "rigida", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Jason R. Swallen", "recordedBy": "Howard S. Gentry", "recordNumber": "", "verbatimEventDate": "1948-09-19", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}