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": ""}
"Frequent small tree, up to several inches in diameter." s;r   United States : ~@C     Sapindaceae t)$+   g Sapindales  pensylvanicum  bN  Michigan rK(T  12922 28   j 1pn ACER PENSYLVANICUM   xz$  1969-07-18     =PC L.   2| EDWARD G. VOSS     6wF> LUCE   
{"catalogNumber": "", "order": "Sapindales", "family": "Sapindaceae", "scientificName": "Acer pensylvanicum", "scientificNameAuthorship": "L.", "genus": "", "subgenus": "", "specificEpithet": "pensylvanicum", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Edward G. Voss", "recordNumber": "12922", "verbatimEventDate": "1969-07-18", "habitat": "", "occurrenceRemarks": "\"Frequent small tree, up to several inches in diameter.\"", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Luce", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}