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": ""}
          Lej Populus    / growing with jack pine in semi-moist ssandy soil.   ca. 7Â½ miles E of Shingleton.NE 1/4 Sec. 33, T46N-R16W (    W=$I 1640     MICHX. M:a8    -86.313713 mI  
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "Michx.", "genus": "Populus", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "1640", "verbatimEventDate": "", "habitat": "Growing with jack pine in semi-moist sandy soil.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "ca. 7\u00c2\u00bd miles E of Shingleton.NE 1/4 Sec. 33, T46N-R16W", "decimalLatitude": "", "decimalLongitude": "-86.313713", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}