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": ""}
  P Apan  Floating in masses, lower cells inflated 2    * ARACEAE   qN H. E. Moore $(Austin) Daubs edxtH  2500 d   X mexico  /IQeA Alismatales  &| JX 4748  A 1948-08-26  |S  1663231     t shallow marginal water, lago de apam, near apam E. Landolt 3 U   Lemna ;o    z lemna obscura    8o7e OBSCURA  hidalgo t: 
{"catalogNumber": "1663231", "order": "Alismatales", "family": "Araceae", "scientificName": "Lemna obscura", "scientificNameAuthorship": "(Austin) Daubs", "genus": "Lemna", "subgenus": "", "specificEpithet": "obscura", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "E. Landolt", "recordedBy": "H. E. Moore", "recordNumber": "4748", "verbatimEventDate": "1948-08-26", "habitat": "", "occurrenceRemarks": "Floating in masses, lower cells inflated", "associatedTaxa": "", "country": "Mexico", "stateProvince": "Hidalgo", "county": "Apan", "municipality": "", "locality": "Shallow marginal water, Lago de Apam, near Apam", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "2500", "maximumElevationInMeters": ""}