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": ""}
van buren ^n  1279551 &%             ~u LOCAL      (47J POACEAE ARENARIUS h    6BI4  LEYMUS    OBEN DUNES, INT3RMIXED WITH MMOPHILA BREVILIGULATA IN SPARSE VEGETATION ^-    .    anton a. eznicek
{"catalogNumber": "1279551", "order": "", "family": "Poaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "Leymus", "subgenus": "", "specificEpithet": "arenarius", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Anton A. Reznicek", "recordedBy": "", "recordNumber": "", "verbatimEventDate": "", "habitat": "open dunes, intermixed with Ammophila breviligulata in sparse vegetation", "occurrenceRemarks": "local", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Van Buren", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}