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": ""}
 1504530 t.kr   C oxalidales   ^z Bunge  FONTANA &3lG`      /=.=M GRPM 41138      / BUNCOMBE  +_CM oxalidaceae  $ zD NOT EVIDENT  ~:E:@ moist, sandy soil  Oxalis fontana IoAe   s.n. +N~@      
{"catalogNumber": "1504530", "order": "Oxalidales", "family": "Oxalidaceae", "scientificName": "Oxalis fontana", "scientificNameAuthorship": "Bunge", "genus": "", "subgenus": "", "specificEpithet": "fontana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Not evident", "recordNumber": "s.n.", "verbatimEventDate": "", "habitat": "Moist, sandy soil", "occurrenceRemarks": "GRPM 41138", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Buncombe", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}