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": ""}
 b gravelly bluff    purpurea y7    4231 M   poales *  1915-08-15 GGT   Pinal +   ARIZONA / M   #~ Aristida    TE poaceae     |3 NEAR REPRESSO RANCH ON ORACLE ROAD  var. =:n#     purpurea y   G=l JOHN J. THORNBER  5|L ARISTIDA PURPUREA VAR. PURPUREA
{"catalogNumber": "", "order": "Poales", "family": "Poaceae", "scientificName": "Aristida purpurea var. purpurea", "scientificNameAuthorship": "", "genus": "Aristida", "subgenus": "", "specificEpithet": "purpurea", "verbatimTaxonRank": "var.", "infraspecificEpithet": "purpurea", "identifiedBy": "", "recordedBy": "John J. Thornber", "recordNumber": "4231", "verbatimEventDate": "1915-08-15", "habitat": "Gravelly bluff", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Arizona", "county": "Pinal", "municipality": "", "locality": "Near Represso Ranch on Oracle Road", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}