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": ""}
743 X  carex      Saratov d    PILOSA 6C)B  K. GROSS 4d   y8 Russia  cyperaceae U  1926-05-29 i   6 v SCOP.   carex pilosa @.   -` c  no data  3 1719303   P Jv PROV SARAT?OV. INVICINIIS OPP. CHVALYNSK. IN SILVA FRONDOSA AD VIAM IN PAG. BOLTUKOVKA      k POALES   
{"catalogNumber": "1719303", "order": "Poales", "family": "Cyperaceae", "scientificName": "Carex pilosa", "scientificNameAuthorship": "Scop.", "genus": "Carex", "subgenus": "", "specificEpithet": "pilosa", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "K. Gross", "recordNumber": "743", "verbatimEventDate": "1926-05-29", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "Russia", "stateProvince": "Saratov", "county": "no data", "municipality": "", "locality": "Prov Saratov. In viciniis opp. Chvalynsk. In silva frondosa ad viam in pag. Boltukovka", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}