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": ""}
 B%:  1986-05-20 1558 D*+   v[j Marshall    z#W1 Lenawee   NIGRA h   J3Z=; salicaceae  salix fHN     robert w. smith VaMeu     v!B K MICHIGAN  salix nigra +qL  united states e6     mich. natur preserve on bean creek, hudson twp. l/   k1g+ -84.303275  ;  WOODS. 
{"catalogNumber": "", "order": "", "family": "Salicaceae", "scientificName": "Salix nigra", "scientificNameAuthorship": "Marshall", "genus": "Salix", "subgenus": "", "specificEpithet": "nigra", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Robert W. Smith", "recordNumber": "1558", "verbatimEventDate": "1986-05-20", "habitat": "Woods.", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "Lenawee", "municipality": "", "locality": "Mich. Nature preserve on Bean Creek, Hudson Twp.", "decimalLatitude": "", "decimalLongitude": "-84.303275", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}