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": ""}
 f  schwein.   1991-07-23 $B      ZI utm 116561, map 40i/15, square 17nt15   Carex retrorsa [-    2 michael j. oldham 12963)C^   rzE Oxford  =- 1384993    &TGo  Canada  Cyperacee ;L    I4= retrorsa    SOUTHWEST OXFORD TOWNSHIP, 5.3 KM W OF MOUNT ELGIN POST OFFICE, WOODS S  OF CEMETERY. J;  
{"catalogNumber": "1384993", "order": "", "family": "Cyperaceae", "scientificName": "Carex retrorsa", "scientificNameAuthorship": "Schwein.", "genus": "", "subgenus": "", "specificEpithet": "retrorsa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Michael J. Oldham", "recordNumber": "12963", "verbatimEventDate": "1991-07-23", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "", "county": "Oxford", "municipality": "", "locality": "Southwest Oxford Township, 5.3 km W of Mount Elgin Post Office, woods S of cemetery.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "UTM 116561, Map 40I/15, Square 17NT15", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}