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 walteri 2 Qy     1120915  |    b contact um herbarium $y  e. l. ekman 16947 %e  (Pursh) A. Heller KUSLS     SaN 1923-08-01     cuba ?]      poales q.0M   Poaceae H   4P+  walteri Echinochloa =!a%c 
{"catalogNumber": "1120915", "order": "Poales", "family": "Poaceae", "scientificName": "Echinochloa walteri", "scientificNameAuthorship": "(Pursh) A. Heller", "genus": "Echinochloa", "subgenus": "", "specificEpithet": "walteri", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "E. L. Ekman", "recordNumber": "16947", "verbatimEventDate": "1923-08-01", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Cuba", "stateProvince": "", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}