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": ""}
     44.644394 l:d 7     SALICACEAE 4    1951-07-12 5KvS7  176 mrZS     LK -84.341359   Michi%gan W-   Uh!5 oscoda  Populus U 2Hc  UNITED STATES [D?^    
{"catalogNumber": "", "order": "", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Populus", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "176", "verbatimEventDate": "1951-07-12", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Oscoda", "municipality": "", "locality": "", "decimalLatitude": "44.644394", "decimalLongitude": "-84.341359", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}