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": ""}
   united states PN   nLZ 1170  A  POWELL  rosales  g   & rubus     (  ROSACEAE 1921-07-31 LuGU  J. E. Kirkwood Q   rubus strigosus U   1534428 1   strigosus A8DC    @-4 Ovando  MICHX. +YfN6    x5z b Montana
{"catalogNumber": "1534428", "order": "Rosales", "family": "Rosaceae", "scientificName": "Rubus strigosus", "scientificNameAuthorship": "Michx.", "genus": "Rubus", "subgenus": "", "specificEpithet": "strigosus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "J. E. Kirkwood", "recordNumber": "1170", "verbatimEventDate": "1921-07-31", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Montana", "county": "Powell", "municipality": "", "locality": "Ovando", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}