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": ""}
 marsh. soil: peat and muck. associes.: calamagrosis, carex, salix, potentilla fruticosa, larix laricina, caltha palustris. K    E.S. George Reserve, 3 mi. west Pinckney, Grid K-24. w       b3tula pumila 1N -    w United States MICHIGAN qn y    -y^v 42.4?457  + F.N. HAMERSTROM, JR.         -8401614 fPBg  Betula lxO?   T[GS; [STAMENS 3, BIFID]
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Betula pumila", "scientificNameAuthorship": "", "genus": "Betula", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "F.N. Hamerstrom, Jr.", "recordNumber": "", "verbatimEventDate": "", "habitat": "Marsh. Soil: Peat and muck. Associes.: Calamagrosis, Carex, Salix, Potentilla fruticosa, Larix laricina, Caltha palustris.", "occurrenceRemarks": "[Stamens 3, bifid]", "associatedTaxa": "", "country": "United States", "stateProvince": "Michigan", "county": "", "municipality": "", "locality": "E.S. George Reserve, 3 mi. west Pinckney, Grid K-24.", "decimalLatitude": "42.4457", "decimalLongitude": "-84.01614", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}