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": ""}
 kG Texas   United States : at  van zandt SWh    ~ 1438898   hydropiperoides  6 j :    U? Z Cont4ct UM Herbarium  =_ Caryophyllales   B3Ws persicaria hydropiperoides    ?. (Michx.) Small          EULA WHITEHOUSE Ac  PERSICARIA ` 
{"catalogNumber": "1438898", "order": "Caryophyllales", "family": "", "scientificName": "Persicaria hydropiperoides", "scientificNameAuthorship": "(Michx.) Small", "genus": "Persicaria", "subgenus": "", "specificEpithet": "hydropiperoides", "verbatimTaxonRank": "", "infraspecificEpithet": "", "identifiedBy": "", "recordedBy": "Eula Whitehouse", "recordNumber": "", "verbatimEventDate": "", "habitat": "", "occurrenceRemarks": "", "associatedTaxa": "", "country": "United States", "stateProvince": "Texas", "county": "Van Zandt", "municipality": "", "locality": "Contact UM Herbarium", "decimalLatitude": "", "decimalLongitude": "", "verbatimCoordinates": "", "minimumElevationInMeters": "", "maximumElevationInMeters": ""}