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.  -88.44149 ?b*E   Najas flexNilis :  y   b%x FREQUENT IN SHALLOW WATER OF GIBSON LAKE   15977  d?=g   l,m 1304482  edward g. voss !    NAJAS @   1988-07-19 3D!   #K$ United Sta7es  46.19607 LjR4  MICHIGAN <!        
{"catalogNumber": "1304482", "order": "", "family": "", "scientificName": "Najas flexilis", "scientificNameAuthorship": "", "genus": "Najas", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Edward G. Voss", "recordNumber": "15977", "verbatimEventDate": "1988-07-19", "habitat": "frequent in shallow water of Gibson Lake", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "sec. 21, T44N, R33W, ca. 2 mi. S of Amasa.", "decimalLatitude": "46.19607", "decimalLongitude": "-88.44149", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}