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": ""}
 8  LEMNA GIBBA      Araceae 4      LEMNA ?   @ 5272   I, j. j. thornber arizona s   Z= Abundant in stagnant springs, mixed with L. minor Linn.  UNITED STATES pjV [  PIMA `(-W     X#o2 1913-06-29     &*>? E. Landolt  |B~J4 L.
{"catalogNumber": "", "order": "", "family": "Araceae", "scientificName": "Lemna gibba", "scientificNameAuthorship": "L.", "genus": "Lemna", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "E. Landolt", "recordedBy": "J. J. Thornber", "recordNumber": "5272", "verbatimEventDate": "1913-06-29", "habitat": "Abundant in stagnant springs, mixed with L. minor Linn.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Arizona", "county": "Pima", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}