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": ""}
 WD GEO. B HINTON    BRt IPOMOEA MAIRETII     MA IRETII  V N contact um herbaBrium      R<  convolvulaceae  qUC Solanales  Mexico h t   CHOISY X   &  1299481    Xk 2928 1932-12-12 #+,I52  gordon d. mcpherson db#4@    mexico K@     ipomoea Tj-@ 
{"catalogNumber": "1299481", "order": "Solanales", "family": "Convolvulaceae", "scientificName": "Ipomoea mairetii", "scientificNameAuthorship": "Choisy", "genus": "Ipomoea", "subgenus": "", "specificEpithet": "mairetii", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Gordon D. McPherson", "recordedBy": "Geo. B. Hinton", "recordNumber": "2928", "verbatimEventDate": "1932-12-12", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Mexico", "stateProvince": "Mexico", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}