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": ""}
   maine r   CYPERACEAE IA     Yke nigra   1933-08-17 7  Hancock M;    nVVOu 6287   x/ o CAREX NIGRA  1/2 mile; north franklin. M  united states gIZo   tV6 Carex   Tn] (l.) reichard    W7Z ray c. friesner   
{"catalogNumber": "", "order": "", "family": "Cyperaceae", "scientificName": "Carex nigra", "scientificNameAuthorship": "(L.) Reichard", "genus": "Carex", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Ray C. Friesner", "recordNumber": "6287", "verbatimEventDate": "1933-08-17", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Maine", "county": "Hancock", "municipality": "", "locality": "1/2 mile north Franklin.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}