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": ""}
    r OPEN SANDY GROUND DOMINATED BY ANDROPOGON VIRGINICUS, DANTHONIA SPICATA, CENTAUREA MACULOSA, ARISTIDA BASIRAMEA, AND POLYTRICHUM PILFERUM.         j1 PAUL M. CATLING, FREDERICK W. CASE & ROBERTA B. CASE     "ALSO PRESENT AT THE SITE WERE: LEPTOLOMA COGNATUM, POA COMPRESSA, EUPHORBIA CO ROLLATA, HIERACIUM GRONOVII, GNAPHALIUM OBTUSIFOLIUM, AGROSTIS HYEMALIS, BOTRYCHIUM DISSECTUM F. OBLIQUUM. SOIL PH FROM ABOUT ROOTS OF S. TUBEROSA, ANDROPOGON VIRGINICUS, ARISTIDA BASIRAMEA, AND DANTHONIA SPICATA WAS 3.9-4.1" )(z    s.n. cs        
{"catalogNumber": "", "order": "", "family": "", "scientificName": "", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Paul M. Catling, Frederick W. Case & Roberta B. Case", "recordNumber": "s.n.", "verbatimEventDate": "", "habitat": "open sandy ground dominated by Andropogon virginicus, Danthonia spicata, Centaurea maculosa, Aristida basiramea, and Polytrichum piliferum.", "occurrenceRemarks": "\"Also present at the site were: Leptoloma cognatum, Poa compressa, Euphorbia corollata, Hieracium gronovii, Gnaphalium obtusifolium, Agrostis hyemalis, Botrychium dissectum f. obliquum. Soil pH from about roots of S. tuberosa, Andropogon virginicus, Aristida basiramea, and Danthonia spicata was 3.9-4.1\"", "associatedTaxa": "", "country": "", "stateProvince": "", "county": "", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}