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": ""}
  $ h. g. macmillan, j. l. stephens poaceae xy   1702921 vJ  manchuria, 1 mi. so. hailar OxH    AGROSTIS PERENNANS D %!P    Fmv perennans        (=  HULUNBUIR  agrostis O/+&k          INNER MONGOLIA  T    .xBC (walter) tuck. 
{"catalogNumber": "1702921", "order": "", "family": "Poaceae", "scientificName": "Agrostis perennans", "scientificNameAuthorship": "(Walter) Tuck.", "genus": "Agrostis", "subgenus": "", "specificEpithet": "perennans", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "H. G. MacMillan, J. L. Stephens", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Inner Mongolia", "county": "Hulunbuir", "municipality": "", "locality": "Manchuria, 1 mi. so. Hailar", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}