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": ""}
 MICHIGAN R 2sa   L^ 1956-08-07  ~4 POPULUS TREMULOIDES  ;>X2 J.E. Eckenwalder     ho POPULUS      Q i tremuloides UNITED STATES $G6O~  Clone 113, female, sample tree 5. hZu             
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Populus tremuloides", "scientificNameAuthorship": "", "genus": "Populus", "subgenus": "", "specificEpithet": "tremuloides", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "J.E. Eckenwalder", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "1956-08-07", "habitat": "", "occurrenceRemarks": "Clone 113, female, sample tree 5.", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}