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": ""}
sec. 21, T44N, R33W, ca. 2 mi. S of Amasa. (  d@        15977 l.]      .0T Iron         U I< FREQUENT IN SHALLOW WATER OF GIBSON LAKE  ya2S flexilis   hydrocharitaceae  _6cY     
{"catalogNumber": "", "order": "", "family": "Hydrocharitaceae", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "flexilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "15977", "verbatimEventDate": "", "habitat": "frequent in shallow water of Gibson Lake", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "Iron", "municipality": "", "locality": "sec. 21, T44N, R33W, ca. 2 mi. S of Amasa.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}