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": ""}
 2897 n #  R. E. S. TANNER <#    A / 1667933    tanga f;   5oW in grassland on clay loam. thickley entwined    9>!2v 1956-06-06   M0 91  b Mtaru Parish, Mseko Section, Mwera Chiefdom Euphorbiaceae ;Rq            7kg R peter ex verdc. & greenway
{"catalogNumber": "1667933", "order": "", "family": "Euphorbiaceae", "scientificName": "", "scientificNameAuthorship": "Peter ex Verdc. & Greenway", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "R. E. S. Tanner", "recordNumber": "2897", "verbatimEventDate": "1956-06-06", "habitat": "in grassland on clay loam. Thickley entwined", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Tanga", "county": "", "municipality": "", "locality": "Mtaru Parish, Mseko Section, Mwera Chiefdom", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "91", "maximumElevationInMeters": ""}