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": ""}
 R;  Open rocky ridge.  r_ Asteraceae   willd. l   %?$/] michigan   ON RIDGE ABOVE DELAWARE MINE.        U 1989-16    1 CENTAUREA  Centaurea nigrescens =<E    0s+ dennis a. albert  nigrescens .EmL    1989-08-11 j#hu   Qtx keweenaw United States  wNo&   g`ubV ASTERALES 
{"catalogNumber": "", "order": "Asterales", "family": "Asteraceae", "scientificName": "Centaurea nigrescens", "scientificNameAuthorship": "Willd.", "genus": "Centaurea", "subgenus": "", "specificEpithet": "nigrescens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Dennis A. Albert", "recordNumber": "1989-16", "verbatimEventDate": "1989-08-11", "habitat": "Open rocky ridge.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Keweenaw", "municipality": "", "locality": "On ridge above Delaware Mine.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}