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": ""}
1517993 i eZ    n -84.01614  BROMUS PUBESCENS GnHX   e. s. geOorge reserve. in section d-8. B  Michigan #A3lL    RFOc 195-07-07   POALES     poaceae Py VT  ANTON A. REZNICEK s<D   p UNITED STATES   SW8#! pubescens Bromus K)^    s.n. l`8c   UH*  MUHL. EX WILLD.   JARL K. HILTUNEN mlh9p  
{"catalogNumber": "1517993", "order": "Poales", "family": "Poaceae", "scientificName": "Bromus pubescens", "scientificNameAuthorship": "Muhl. ex Willd.", "genus": "Bromus", "subgenus": "", "specificEpithet": "pubescens", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "Anton A. Reznicek", "recordedBy": "Jarl K. Hiltunen", "recordNumber": "s.n.", "verbatimEventDate": "1959-07-07", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "E. S. George Reserve. in Section D-8.", "decimalLatitude": "", "decimalLongitude": "-84.01614", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}