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": ""}
 a8! _ FRONTERA, NEAR EL PASO     Y  1852-03-29  : Astragalus nuttallianus var. canescens Texas daFN    united states AA=  FABALES A     H canescens 258 x    K]o@ el paso  w.h. emory, c.c. parry, t.m. bigelow, charles wright, & a. schott *%ld  ASTRAGALUS M   nuttallianus P    k+ VAR.    k0iS Fabaceae  1502900 >aWL9 
{"catalogNumber": "1502900", "order": "Fabales", "family": "Fabaceae", "scientificName": "Astragalus nuttallianus var. canescens", "scientificNameAuthorship": "", "genus": "Astragalus", "subgenus": "", "specificEpithet": "nuttallianus", "verbatimTaxonRank": "var.", "infraspecificEpithet": "canescens", "identifiedBy": "", "recordedBy": "W.H. Emory, C.C. Parry, J.M. Bigelow, Charles Wright, & A. Schott", "recordNumber": "258", "verbatimEventDate": "1852-03-29", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Texas", "county": "El Paso", "municipality": "", "locality": "Frontera, near El Paso", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}