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": ""}
R. Br. 0u@      Oc CA1AMAGROSTIS PURPURASCENS  canada 4*jx!  Poaceae V hk   1408702 c  i_v purburascens     1947-07-26 2357 E.Vz    _ Calamagrostis  7= POALES  Contact UM Herbarium fcl     ; J_ Francis Harper       
{"catalogNumber": "1408702", "order": "Poales", "family": "Poaceae", "scientificName": "Calamagrostis purpurascens", "scientificNameAuthorship": "R. Br.", "genus": "Calamagrostis", "subgenus": "", "specificEpithet": "purpurascens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Francis Harper", "recordNumber": "2357", "verbatimEventDate": "1947-07-26", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Canada", "stateProvince": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}