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": ""}
 bt&t Engelm. CONTACT UM HERBARIUM <-   5S:b canada   xV  6251   Myosotis macrosperma Zdf        H8 1981-05-06   J; AntoUn A. Reznicek  P.?@ nessex  macrosperma C22`    ontario 3   1r myosotis   K BORAGNACEAE   
{"catalogNumber": "", "order": "", "family": "Boraginaceae", "scientificName": "Myosotis macrosperma", "scientificNameAuthorship": "Engelm.", "genus": "Myosotis", "subgenus": "", "specificEpithet": "macrosperma", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Anton A. Reznicek", "recordNumber": "6251", "verbatimEventDate": "1981-05-06", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "Ontario", "county": "Essex", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}