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": ""}
uncommon along se-facing sandy slope on lip of outcropping limestone escarpment under quercus spp./ carya spp. forest with chimaphila maculata, cornus florida, toxicodendron rydbergii  xn         lg ulmus rubra  LOOKOUT MOUNTAIN CAMPGROUND, MOUNTAIN SHADOWS DRIVE, TRENTON I$ Zs  14515B   United States JLDxg  2000-03-17  mK    sQ RUBRA    , ulmus         
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Ulmus rubra", "scientificNameAuthorship": "", "genus": "Ulmus", "subgenus": "", "specificEpithet": "rubra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "", "recordNumber": "14515B", "verbatimEventDate": "2000-03-17", "habitat": "", "occurrenceRemarks": "Uncommon along SE-facing sandy slope on lip of outcropping limestone escarpment under Quercus spp./ Carya spp. forest with Chimaphila maculata, Cornus florida, Toxicodendron rydbergii", "associatedTaxa": "", "country": "United States", "stateProvince": "", "county": "", "municipality": "", "locality": "Lookout Mountain Campground, Mountain Shadows Drive, Trenton", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}