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": ""}
CAV. um! ]   & mexicana  1&- s.n.  ASCLEPIAS /6   K $: asc|epiaWs mexicana   4J Massachusetts        united states GENTIANALES  S    ?U middlesex  y 1904-08-25     gh gray botanic garden, cambridge [top label]; boston (cambridge botanic garden) [bottom label]  0p Apocynaceae  EMMA J. COLE  x   1521452 kX/L   K) GRPM 52725 
{"catalogNumber": "1521452", "order": "Gentianales", "family": "Apocynaceae", "scientificName": "Asclepias mexicana", "scientificNameAuthorship": "Cav.", "genus": "Asclepias", "subgenus": "", "specificEpithet": "mexicana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Emma J. Cole", "recordNumber": "s.n.", "verbatimEventDate": "1904-08-25", "habitat": "", "occurrenceRemarks": "GRPM 52725", "associatedTaxa": "", "country": "United States", "stateProvince": "Massachusetts", "county": "Middlesex", "municipality": "", "locality": "Gray Botanic Garden, Cambridge [top label]; Boston (Cambridge Botanic Garden) [bottom label]", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}