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": ""}
      -*U Michigan 1956-07-18 TH?     wi+U 45.55279 BURTON V. BARNES g~    6#g 1559933 UNITED STATES j/     3mmet ZE3u    Populus     TREMULOIDES 3N~`a   Michx. 3n    ^ Salicaceae    g$ Pellston Plain Research Site. 
{"catalogNumber": "1559933", "order": "", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "Michx.", "genus": "Populus", "subgenus": "", "specificEpithet": "tremuloides", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Burton V. Barnes", "recordNumber": "", "verbatimEventDate": "1956-07-18", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Emmet", "municipality": "", "locality": "Pellston Plain Research Site.", "decimalLatitude": "45.55279", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}