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": ""}
michx. 4R     populus 18    5u= Moraine Research Site.  Il Cheboygan 51.3 QF      LsXRY MICHIGAN    [ salicaceae 1559851 8p46     CLONE 17, MA.LE, SAMPLE TREE 3. *5ah         burton v. barnes 
{"catalogNumber": "1559851", "order": "", "family": "Salicaceae", "scientificName": "", "scientificNameAuthorship": "Michx.", "genus": "Populus", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Burton V. Barnes", "recordNumber": "51.3", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "Clone 117, male, sample tree 3.", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Cheboygan", "municipality": "", "locality": "Moraine Research Site.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}