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": ""}
  Echinochloa s    (a 41.829769   _EG ECHINOCHLOA WALTERI  & UNITED STATES  Kg a POALES GEORGE L. AMES, M.D. rgYI.     q 9W (Pursh) A. Heller  -86.254177 Yg     9 k poaceae 1867 _By   MICHIGAN Zw9   niles ^   /rG/ berrien    1212794 I4L   wN WALTERI
{"catalogNumber": "1212794", "order": "Poales", "family": "Poaceae", "scientificName": "Echinochloa walteri", "scientificNameAuthorship": "(Pursh) A. Heller", "genus": "Echinochloa", "subgenus": "", "specificEpithet": "walteri", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "George L. Ames, M.D.", "recordNumber": "", "verbatimEventDate": "1867", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Berrien", "municipality": "", "locality": "Niles", "decimalLatitude": "41.829769", "decimalLongitude": "-86.254177", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}