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": ""}
 yA4U J.E. Eckenwalder   u =E/ -84.326871   +CXHN UNITED STATES VAR.  I-   *< MALPIGHIALES  *Bv 1221968 Populus u~c  midland X  roadside  [J  43.612162 ~  on m 20, four miles west of midland. .   n <aV R.R. Dreisbach    Populus alba var. al8a #  ALBA  j_>t    U|V alba   ].GA  1934-05-15  7928 XN    a~ i MICHIGAN
{"catalogNumber": "1221968", "order": "Malpighiales", "family": "", "scientificName": "Populus alba var. alba", "scientificNameAuthorship": "", "genus": "Populus", "subgenus": "", "specificEpithet": "alba", "verbatimTaxonRank": "var.", "infraspecificEpithet": "alba", "identifiedBy": "J.E. Eckenwalder", "recordedBy": "R.R. Dreisbach", "recordNumber": "7928", "verbatimEventDate": "1934-05-15", "habitat": "Roadside", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Midland", "municipality": "", "locality": "on M 20, Four miles West of Midland.", "decimalLatitude": "43.612162", "decimalLongitude": "-84.326871", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}