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": ""}
   IEfi 1897-06-27 Cultivated; GRPM 42451 J]            t Tilia  42.96336 /90   m Malvaceae kent 6     2B>-v MARY B@. FALLASS   5  1506888  uU[ Tilia europaea  [ europaea    L.  s.n. fCKkQ   !x Michigan
{"catalogNumber": "1506888", "order": "", "family": "Malvaceae", "scientificName": "Tilia europaea", "scientificNameAuthorship": "L.", "genus": "Tilia", "subgenus": "", "specificEpithet": "europaea", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Mary B. Fallass", "recordNumber": "s.n.", "verbatimEventDate": "1897-06-27", "habitat": "", "occurrenceRemarks": "Cultivated; GRPM 42451", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Kent", "municipality": "", "locality": "", "decimalLatitude": "42.96336", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}