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": ""}
        wG 1838-06-21      v V 1556818          2`C~ S.N.     X First Geological Surey of Michigan, 1837â1840, Douglass Houghton, State Geologist; Abram Sager,Botanist and Zoologist, 1837; John Wight, State B0tanist, 1838, assisted by George H. Bull [North of St. Joseph. The pencil label is thought to be the work of an herbarium assi7stant, c. 1870] [fCoordinates along the Paw Paw River, just N of its ,mouth at the St. Joseph River]   
{"catalogNumber": "1556818", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "s.n.", "verbatimEventDate": "1838-06-21", "habitat": "", "occurrenceRemarks": "First Geological Survey of Michigan, 1837\u00e2\u0080\u00931840, Douglass Houghton, State Geologist; Abram Sager, Botanist and Zoologist, 1837; John Wright, State Botanist, 1838, assisted by George H. Bull [North of St. Joseph. The pencil label is thought to be the work of an herbarium assistant, ca. 1870] [Coordinates along the Paw Paw River, just N of its mouth at the St. Joseph River]", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}