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": ""}
       @ Primary forest.    1972-08-21 c0 <   5V Thomas B. Croat        tree 40 m; flowers greenish; fruits green; immature. Pms4U   l. 1NE  vandera de mazan, from rio amazonas to rio napa. u7     
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "L.", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Thomas B. Croat", "recordNumber": "", "verbatimEventDate": "1972-08-21", "habitat": "Primary forest.", "occurrenceRemarks": "Tree 40 m; flowers greenish; fruits green; immature.", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "Vandera de Mazan, from Rio Amazonas to Rio Napa.", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}