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": ""}
1973-08-15     Lro alger   +w& L.  BRANCH FROM SMALL TREE (CA. 6" DBH) GROWING ON EDGE OF SMALL BOG-LAKE.  Nz   Rosales (   sand point. Vy3@L   ulmus americana Lb   wd 7- 1354583  + 46.450773 AMERICANA IK     398      (X michigan   Qf ulmus     SQ Robert H. Read  QYog united states
{"catalogNumber": "1354583", "order": "Rosales", "family": "", "scientificName": "Ulmus americana", "scientificNameAuthorship": "L.", "genus": "Ulmus", "subgenus": "", "specificEpithet": "americana", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Robert H. Read", "recordNumber": "398", "verbatimEventDate": "1973-08-15", "habitat": "Branch from small tree (ca. 6\" DBH) growing on edge of small bog-lake.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Alger", "municipality": "", "locality": "Sand Point.", "decimalLatitude": "46.450773", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}