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": ""}
    I Hainan   + 1705850   3Z+Z moist, level land, sandy soil, meadow, cult. field   xJ 1932-09-25  18 u   SANGUINALIS y, F7     B u1 Mei Maan and vicinity  Digitaria sanguinalis 5Zh    Z In* Lei, C. I.    ,H:Y ching mai     hA7 poales  T china
{"catalogNumber": "1705850", "order": "Poales", "family": "", "scientificName": "Digitaria sanguinalis", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "sanguinalis", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Lei, C. I.", "recordNumber": "18", "verbatimEventDate": "1932-09-25", "habitat": "moist, level land, sandy soil, meadow, cult. field", "occurrenceRemarks": "", "associatedTaxa": "", "country": "China", "stateProvince": "Hainan", "county": "Ching Mai", "municipality": "", "locality": "Mei Maan and vicinity", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}