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": ""}
 c  1960-07-15    =Hhf retrorsa   carex retrorsa w O  :mb Michigan 42.300243 ehLc    wCHp cyperaceae washtenaw rr   F$ NORTH END OF TAMARACK STAND     X@ 2159  c-6sxL Carex   M POALES united states 8SE  edward g. voss U+]wa   Hu6 schwein. ALFRED E. SCHUYLER       -83.662835 University of Michigan Botanical Gardens, Dixboro Site, 4.5 mi northeast o!f Ann Arbor  .d  
{"catalogNumber": "", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex retrorsa", "scientificNameAuthorship": "Schwein.", "genus": "Carex", "subgenus": "", "specificEpithet": "retrorsa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Edward G. Voss", "recordedBy": "Alfred E. Schuyler", "recordNumber": "2159", "verbatimEventDate": "1960-07-15", "habitat": "North end of tamarack stand", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Washtenaw", "municipality": "", "locality": "University of Michigan Botanical Gardens, Dixboro Site, 4.5 mi northeast of Ann Arbor", "decimalLatitude": "42.300243", "decimalLongitude": "-83.662835", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}