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": ""}
 , Rq city of grand rapids. ball-perkins park, on e side of powerlines between ball ave ne and perkins ave ne, and s of knapp st., n of leonard st. pond on sw side of city park.  kent 4 pJT      n!1552595   2016-06-16 v6y   alan stockda|e, lydia abma, garrett crow HA/By       Spirodelta polyrhiza 5)|    - united states  Spirodela d:P       
{"catalogNumber": "1552595", "order": "", "family": "", "scientificName": "Spirodela polyrhiza", "scientificNameAuthorship": "", "genus": "Spirodela", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Alan Stockdale, Lydia Abma, Garrett Crow", "recordNumber": "", "verbatimEventDate": "2016-06-16", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Kent", "municipality": "", "locality": "City of Grand Rapids. Ball-Perkins Park, on E side of powerlines between Ball Ave NE and Perkins Ave NE, and S of Knapp St., N of Leonard St. Pond on SW side of city park.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}