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": ""}
 BN 1996-04-12     1u1 J ARKANSAS     poales 3[        A carex umbellata   6900 z@G     !mvc 1390689    ~=u UMBELLATA BOSTON MOUNTA|N RANGER DISTRICT OZARK NATIONAL FOREST, 43 MILES SOUTH OF THE MULBERRY RIVER ON ARKANSAS HIGHWAY 23 AT THE PIG TRAIL SCENIC BYWAY SIGN. - U    
{"catalogNumber": "1390689", "order": "Poales", "family": "", "scientificName": "Carex umbellata", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "umbellata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "6900", "verbatimEventDate": "1996-04-12", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Arkansas", "county": "", "municipality": "", "locality": "Boston Mountain Ranger District Ozark National Forest, 4.3 miles south of the Mulberry River on Arkansas Highway 23 at the Pig Trail Scenic Byway Sign.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}