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": ""}
 4 1937-08-10   z~JbR HYDROCHARITACEAE         R` Michigan          u: (WILLD.) ROSTK. & W. L. E. SCHMIDT  M-r D.C. Chandler   c Jz FLEXILIS depth of water: 1 ft. bottom: sand & peat <?+WK   44.52954 >s   `p Oscoda -84.14412 -~M  
{"catalogNumber": "", "order": "", "family": "Hydrocharitaceae", "scientificName": "", "scientificNameAuthorship": "(Willd.) Rostk. & W. L. E. Schmidt", "genus": "", "subgenus": "", "specificEpithet": "flexilis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "D.C. Chandler", "recordNumber": "", "verbatimEventDate": "1937-08-10", "habitat": "Depth of Water: 1 ft. Bottom: Sand & peat", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Michigan", "county": "Oscoda", "municipality": "", "locality": "", "decimalLatitude": "44.52954", "decimalLongitude": "-84.14412", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}