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": ""}
    united states I j  1987-04-04 x[   : CAMERON    4741 8  1208839 _S     edge of road along chenier perdue 3t[pD  Lemna obscura d^vL  araceae    florence m. givens atn   (austin) daubs qE> f    Lemna ;    ALISMATALES zS 
{"catalogNumber": "1208839", "order": "Alismatales", "family": "Araceae", "scientificName": "Lemna obscura", "scientificNameAuthorship": "(Austin) Daubs", "genus": "Lemna", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Florence M. Givens", "recordNumber": "4741", "verbatimEventDate": "1987-04-04", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Cameron", "municipality": "", "locality": "Edge of road along Chenier Perdue", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}