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": ""}
2870 :_    E. E. Maire 4CW3?     LANDOLT x(f   |MaL| Lemna japonica  no data z j$    japonica Mi+5H     Y china  7N 1663487 YUNNAN /*     ALISMATALES MJb  e. landolt C C   o PLAIN OF TONG- TCHOUAN 2800 J    A lemna 
{"catalogNumber": "1663487", "order": "Alismatales", "family": "", "scientificName": "Lemna japonica", "scientificNameAuthorship": "Landolt", "genus": "Lemna", "subgenus": "", "specificEpithet": "japonica", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "E. Landolt", "recordedBy": "E. E. Maire", "recordNumber": "2870", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "China", "stateProvince": "Yunnan", "county": "no data", "municipality": "", "locality": "Plain of Tong- tchouan", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "2800", "maximumElevationInMeters": ""}