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": ""}
s.n. = p@  1897-7-31 9=v       % POACEAE    [~g  Roth      date [?] specimen   WASTE GROUND 84P+    X]=, North Greenfield  1 reuben m. strong  w|sconsin FJ      poales Xv  1403466 pM 
{"catalogNumber": "1403466", "order": "Poales", "family": "Poaceae", "scientificName": "", "scientificNameAuthorship": "Roth", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Reuben M. Strong", "recordNumber": "s.n.", "verbatimEventDate": "1897-07-31", "habitat": "Waste ground", "occurrenceRemarks": "date [?] specimen", "associatedTaxa": "", "country": "", "stateProvince": "Wisconsin", "county": "", "municipality": "", "locality": "North Greenfield", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}