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": ""}
  3-k5~ PALUDIGENA  < United States echinochloa  M   PQ:w POALES  POACEAE |%    6n WIEGAND       4*D2 polk    )pn  1931-05-28  echinochloa paludigena 5g2!       ? Contact UM Herbarium 5556 ?tU_H   
{"catalogNumber": "", "order": "Poales", "family": "Poaceae", "scientificName": "Echinochloa paludigena", "scientificNameAuthorship": "Wiegand", "genus": "Echinochloa", "subgenus": "", "specificEpithet": "paludigena", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "5556", "verbatimEventDate": "1931-05-28", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "Polk", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}