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": ""}
       N Xxs contact um herbarium   I[w TEXAS (KUNTH) HITCHC LfWQ   william a. silveus =     ECHINOCHLOA POLYST4CHYA 1<    ZS)x` 2702     1411674 bDz_:   G=` & polystachya  Poaceae J*87u  1938-03-13 E| 
{"catalogNumber": "1411674", "order": "", "family": "Poaceae", "scientificName": "Echinochloa polystachya", "scientificNameAuthorship": "(Kunth) Hitchc.", "genus": "", "subgenus": "", "specificEpithet": "polystachya", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "William A. Silveus", "recordNumber": "2702", "verbatimEventDate": "1938-03-13", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "", "stateProvince": "Texas", "county": "", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}