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": ""}
L. U  JOHN H. EHLERS (       U 1223392  1927-08-13 / u~s     A6 O 3577  MYRIOPHYLLUM `  45.509053 r $;*      o4mP verticillatum   saxifragales QF)      NIGGER CREEK NEAR TOPINABEE h 
{"catalogNumber": "1223392", "order": "Saxifragales", "family": "", "scientificName": "", "scientificNameAuthorship": "L.", "genus": "Myriophyllum", "subgenus": "", "specificEpithet": "verticillatum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "John H. Ehlers", "recordNumber": "3577", "verbatimEventDate": "1927-08-13", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Nigger Creek near Topinabee", "decimalLatitude": "45.509053", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}