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": ""}
    G>P CHARLES T. BRYSON  At!  RETROFLEXUS      Cyperus/ retroflexus v4r. retroflxus 8x      RETROFLEXUS hGGG0    < 1445546  x!_l cyperus  DcCxq Cyperaceae  d_vb VAR.    O MISSOURI   
{"catalogNumber": "1445546", "order": "", "family": "Cyperaceae", "scientificName": "Cyperus retroflexus var. retroflexus", "scientificNameAuthorship": "", "genus": "Cyperus", "subgenus": "", "specificEpithet": "retroflexus", "verbatimTaxonRank": "var.", "infraspecificEpithet": "retroflexus", "identifiedBy": "", "recordedBy": "Charles T. Bryson", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Missouri", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}