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": ""}
     MARGIN OF POND AT BASE OF LIMESTONE CLIFF x7H?  1906-09-16 )    poales N   qn4bX LINCOLN.     8o MICHX.        W )Y acuminatus  5P S.N. merritt l. fernald (:  Providence  H    1446510 ,* 
{"catalogNumber": "1446510", "order": "Poales", "family": "", "scientificName": "", "scientificNameAuthorship": "Michx.", "genus": "", "subgenus": "", "specificEpithet": "acuminatus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Merritt L. Fernald", "recordNumber": "s.n.", "verbatimEventDate": "1906-09-16", "habitat": "Margin of pond at base of limestone cliff", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Providence", "municipality": "", "locality": "Lincoln.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}