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": ""}
   2SG 1542965 pangani R(G,    rR%W tree 60 feet tall with single trunk; sap colourless; leaves soft, leathery, dull green     G MACROSTACHYUS    V  Euphorbiaceae  py Tanzania   K<!X 3588   R. E. S. TANNER ANiP7    M~ CROTON $ In thick forest TANGA 5N463    HOCHST. X DELILE h   N 1957-07-09 
{"catalogNumber": "1542965", "order": "", "family": "Euphorbiaceae", "scientificName": "", "scientificNameAuthorship": "Hochst. ex Delile", "genus": "Croton", "subgenus": "", "specificEpithet": "macrostachyus", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "R. E. S. Tanner", "recordNumber": "3588", "verbatimEventDate": "1957-07-09", "habitat": "In thick forest", "occurrenceRemarks": "Tree 60 feet tall with single trunk; sap colourless; leaves soft, leathery, dull green", "associatedTaxa": "", "country": "Tanzania", "stateProvince": "Tanga", "county": "Pangani", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}