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": ""}
JEFF H. RETTIG  >v    @i cyperaceae  r 1480    :1 NIGROMARGINATA  1380548 yK+AI     Carex nigromarginata d d~       AgMT United States  y>/S2 POLK  _o TRS: T4S R28W SEC 30 SW1/4 SE1/4   a/9` CAREX ARKANSAS e  schwein. ap     1986-04-15 2 
{"catalogNumber": "1380548", "order": "", "family": "Cyperaceae", "scientificName": "Carex nigromarginata", "scientificNameAuthorship": "Schwein.", "genus": "Carex", "subgenus": "", "specificEpithet": "nigromarginata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Jeff H. Rettig", "recordNumber": "1480", "verbatimEventDate": "1986-04-15", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Arkansas", "county": "Polk", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "TRS: T4S R28W sec 30 SW1/4 SE1/4", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}