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": ""}
   R united states    Edward G. Voss    ASTERACEAE JP     Rx( -83.51671    n1/2 sec. 22, t15n, r8e, ca. 4 mi. n of unionville.  TE,P     MDichigan Fh7  (l) g. l. nesom |i     1250776  wes Symphyotrichum ericoides     |t  1958-09-20  ?4  ERICOIDES 8357 Tp  
{"catalogNumber": "1250776", "order": "", "family": "Asteraceae", "scientificName": "Symphyotrichum ericoides", "scientificNameAuthorship": "(L.) G. L. Nesom", "genus": "", "subgenus": "", "specificEpithet": "ericoides", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Edward G. Voss", "recordNumber": "8357", "verbatimEventDate": "1958-09-20", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "N1/2 sec. 22, T15N, R8E, ca. 4 mi. NW of Unionville.", "decimalLatitude": "", "decimalLongitude": "-83.51671", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}