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": ""}
  asteraceae _E_,  Lorestan ,JuQ   1x8r m 18556  XANTHIUM SIBIRICUM  sk`     walter n. koelz LU.wi   SIBIRICUM ,fs2t  XANTHIUM Lj   XlNSB 1941-09-28  ]=  m 1558011  BORUERD JL     $ W~ IRAN   BURUJIRD, PROVINCE OF LURISTAN `   Infield Lb  
{"catalogNumber": "1558011", "order": "", "family": "Asteraceae", "scientificName": "Xanthium sibiricum", "scientificNameAuthorship": "", "genus": "Xanthium", "subgenus": "", "specificEpithet": "sibiricum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Walter N. Koelz", "recordNumber": "18556", "verbatimEventDate": "1941-09-28", "habitat": "In field", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Iran", "stateProvince": "Lorestan", "county": "Borujerd", "municipality": "", "locality": "Burujird, Province of Luristan", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}