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": ""}
 G. L. WEBSTER & K. I. MILLER aK H  4550 Stf,   1952-07-29 c-   ,c_r FRUTICULOSUS   +Jd/ 1585   +F  CROTON FRUTICULOSUS   UNITED STATES 8k/      1 EUPHORBIACEAE      U_; ENGELM. EX TORR.   1$543239 FuYE[   common on rocky banks and gravelly streambed k.   roton j 
{"catalogNumber": "1543239", "order": "", "family": "Euphorbiaceae", "scientificName": "Croton fruticulosus", "scientificNameAuthorship": "Engelm. ex Torr.", "genus": "Croton", "subgenus": "", "specificEpithet": "fruticulosus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "G. L. Webster & K. I. Miller", "recordNumber": "4550", "verbatimEventDate": "1952-07-29", "habitat": "common on rocky banks and gravelly streambed", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "1585", "maximumElevationInMeters": ""}