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": ""}
 1521910 ?  Valverda [Valvrde] Bridge, Cherry Creek, Denver uoL  boraginales SX& e  1895-07-12 t:)u  United States O_lQ|   colorado ~   H S.N.     ,lj emma j. cole     c circinata phacelia circinata G%tz  hydrophyllaceae ;o^W   7C DENVER grpm 50336 !#ci   Vb4 PHACELIA    R-! (WILLD.) JACQ.  
{"catalogNumber": "1521910", "order": "Boraginales", "family": "Hydrophyllaceae", "scientificName": "Phacelia circinata", "scientificNameAuthorship": "(Willd.) Jacq.", "genus": "Phacelia", "subgenus": "", "specificEpithet": "circinata", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Emma J. Cole", "recordNumber": "s.n.", "verbatimEventDate": "1895-07-12", "habitat": "", "occurrenceRemarks": "GRPM 50336", "associatedTaxa": "", "country": "United States", "stateProvince": "Colorado", "county": "Denver", "municipality": "", "locality": "Valverda [Valverde] Bridge, Cherry Creek, Denver", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}