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": ""}
 1818 kk    DDU Crataegus  _  Q [Stamens 10]    United States +SR       >1JN OCCASIONAL SMALL TREE AT EDGE OF QUERCUS WOODS. michigan u~        k*f -83.411055 Iosco R=W    b JOHN V. FREUDENSTEIN     f2> 1985-08-09
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "Crataegus", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John V. Freudenstein", "recordNumber": "1818", "verbatimEventDate": "1985-08-09", "habitat": "Occasional small tree at edge of Quercus woods.", "occurrenceRemarks": "[Stamens 10]", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Iosco", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "-83.411055", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}