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": ""}
  piper retrofractum  il CALABARZON 8uR  1641865 ,*x#    HQ 3796    q CALOOCAN  wW4gb 1946-09-25 retrofractum E     g M. D. SULIT    ]$% PIPER   Vahl  *wM  philippines / 6)     Rizal o  
{"catalogNumber": "1641865", "order": "", "family": "", "scientificName": "Piper retrofractum", "scientificNameAuthorship": "Vahl", "genus": "Piper", "subgenus": "", "specificEpithet": "retrofractum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "M. D. Sulit", "recordNumber": "3796", "verbatimEventDate": "1946-09-25", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Philippines", "stateProvince": "Calabarzon", "county": "Rizal", "municipality": "", "locality": "Caloocan", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}