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": ""}
    +M`-Z UNITED STATES             w merrit l. fernald & edward b. chmberlain CAREX UMBELLATA V   [# ^ kennebec     1~xT Plantae exsiccatae Grayanae [Anonymous, Pl. Exs. Grayan.], 1 - 1500 or more, Anonymous, eks #: 77     X maine  
{"catalogNumber": "", "order": "", "family": "", "scientificName": "Carex umbellata", "scientificNameAuthorship": "", "genus": "", "subgenus": "", "specificEpithet": "", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Merritt L. Fernald & Edward B. Chamberlain", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "Plantae exsiccatae Grayanae [Anonymous, Pl. Exs. Grayan.], 1 - 1500 or more, Anonymous, exs #: 77", "associatedTaxa": "", "country": "United States", "stateProvince": "Maine", "county": "Kennebec", "municipality": "", "locality": "", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}