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": ""}
   c4  Ehrh. 1948-08-20  n  1468450 A,   PRUNUS X(gg  ROSALES m,mz     W 43.5186 gravelly wind-blown plains,  "desert" abundant on ridqes and hillocks. x4E  Prunus serotina  N     F 1 mile west of Big Prairie.  |K united states     /2; m -85.66252 Michigan g;-   > ! "TREE 10 M HIGH, LEAVES SLIGHLY WHITENED BENEATH; FRUIT TURNING RED, FINALLY BLACK" Rosaceae T  SEROTINA f8o   
{"catalogNumber": "1468450", "order": "Rosales", "family": "Rosaceae", "scientificName": "Prunus serotina", "scientificNameAuthorship": "Ehrh.", "genus": "Prunus", "subgenus": "", "specificEpithet": "serotina", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1948-08-20", "habitat": "Gravelly wind-blown plains, \"desert\" abundant on ridges and hillocks.", "occurrenceRemarks": "\"Tree 10 m high, leaves slightly whitened beneath; fruit turning red, finally black\"", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "1 mile west of Big Prairie.", "decimalLatitude": "43.51863", "decimalLongitude": "-85.66252", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}