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": ""}
1878-08-17 +Mhv.   T UNITED STATES    Calamagrostis pickeringii dARIc  1408675 8(Bw  s.n. K]     contact um herbarium MDF A    i`cr A. GRAY  grafton  nU^  POACEAE ]$//   BQ frederick h. horsford      7^ Calamagrostis    0 new hampshire 
{"catalogNumber": "1408675", "order": "", "family": "Poaceae", "scientificName": "Calamagrostis pickeringii", "scientificNameAuthorship": "A. Gray", "genus": "Calamagrostis", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Frederick H. Horsford", "recordNumber": "s.n.", "verbatimEventDate": "1878-08-17", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "New Hampshire", "county": "Grafton", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}